Number 121 facts

The odd number 121 is spelled 🔊, and written in words: one hundred and twenty-one. The ordinal number 121st is said 🔊 and written as: one hundred and twenty-first. The meaning of the number 121 in Maths: Is it Prime? Factorization and prime factors tree. The square root and cube root of 121. What is 121 in computer science, numerology, codes and images, writing and naming in other languages. Other interesting facts, comments (1), news related to 121.

Interesting facts about the number 121


  • (121) Hermione is asteroid number 121. It was discovered by J. C. Watson from Detroit Observatory, Ann Arbor on 5/12/1872.

Areas, mountains and surfaces

  • The total area of Isabela Island is 1,819 square miles (4,711 square km). Country Ecuador (Galápagos Province). 121th largest island in the world.

Distances between cities

  • There is a 76 miles (121 km) direct distance between Ahvaz (Iran) and Al Başrah (Iraq).
  • There is a 121 miles (194 km) direct distance between Almaty (Kazakhstan) and Bishkek (Kyrgyzstan).
  • There is a 121 miles (194 km) direct distance between Pyongyang (North Korea) and Seoul (South Korea).


  • Chinese checkerboard has 121 holes.
  • Pokémon Starmie (Sutāmī) is a Pokémon number # 121 of the National Pokédex. Starmie is a water-type and psychic Pokémon in the first generation. It is a Water 3 egg group Pokémon. Starmie's other indexes are Kalos Centro index 035 - Coastal Zone Pokédex, Hoenn index 144 , Johto index 168 , Unova index 239 .

History and politics

  • United Nations Security Council Resolution number 121, adopted 12 December 1956. Admission of Japan. Resolution text.


  • 121 is the smallest multi-digit palindromic square
  • 121 is the sum of the first five powers of 3: 121 = 1 + 3 + 9 + 27 + 81
  • 121 is the only square of the form 1 + n + n2 + n3 + n4.

What is 121 in other units

The decimal (Arabic) number 121 converted to a Roman number is CXXI. Roman and decimal number conversions.
The number 121 converted to a Mayan number is mayan number 121
Decimal and Mayan number conversions.

Weight conversion

121 kilograms (kg) = 266.8 pounds (lbs)
121 pounds (lbs) = 54.9 kilograms (kg)

Length conversion

121 kilometers (km) equals to 75.186 miles (mi).
121 miles (mi) equals to 194.731 kilometers (km).
121 meters (m) equals to 194.731 feet (ft).
121 feet (ft) equals 36.881 meters (m).
121 centimeters (cm) equals to 47.6 inches (in).
121 inches (in) equals to 307.3 centimeters (cm).

Temperature conversion

121° Fahrenheit (°F) equals to 49.4° Celsius (°C)
121° Celsius (°C) equals to 249.8° Fahrenheit (°F)

Power conversion

121 Horsepower (hp) equals to 88.98 kilowatts (kW)
121 kilowatts (kW) equals to 164.54 horsepower (hp)

Time conversion

(hours, minutes, seconds, days, weeks)
121 seconds equals to 2 minutes, 1 second
121 minutes equals to 2 hours, 1 minute

Codes and images of the number 121

Number 121 morse code: .---- ..--- .----
Sign language for number 121:
Sign language for number 121 Sign language for number 121 Sign language for number 121
Number 121 in braille:
Number 121 in braille
Images of the number
Image (1) of the numberImage (2) of the number
Number 121 black image Number 121 red image
More images, other sizes, codes and colors ...

Number 121 infographic

Year 121 AD

  • The Temple of Venus was built in Rome.
  • Roman Emperor Marcus Aurelius was born.
  • Empress Deng Sui died. (China)

Gregorian, Hebrew, Islamic, Persian and Buddhist Year (Calendar)

Gregorian year 121 is Buddhist year 664.
Buddhist year 121 is Gregorian year 422 a. C.
Gregorian year 121 is Islamic year -516 or -515.
Islamic year 121 is Gregorian year 738 or 739.
Gregorian year 121 is Persian year -502 or -501.
Persian year 121 is Gregorian 742 or 743.
Gregorian year 121 is Hebrew year 3881 or 3882.
Hebrew year 121 is Gregorian year 3639 a. C.
The Buddhist calendar is used in Sri Lanka, Cambodia, Laos, Thailand, and Burma. The Persian calendar is the official calendar in Iran and Afghanistan.

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Advanced math operations

Is Prime?

The number 121 is not a prime number. The closest prime numbers are 113, 127.
The 121st prime number in order is 661.

Factorization and factors (dividers)

The prime factors of 121 are 112 or 11^2 or 11**2
The factors of 121 are 1, 11, 121.
Total factors 3.
Sum of factors 133 (12).

Prime factor tree


The second power of 1212 is 14.641.
The third power of 1213 is 1.771.561.


The square root √121 is 11 exact square root.
The cube root of 3121 is 4,946087.


The natural logarithm of No. ln 121 = loge 121 = 4,795791.
The logarithm to base 10 of No. log10 121 = 2,082785.
The Napierian logarithm of No. log1/e 121 = -4,795791.

Trigonometric functions

The cosine of 121 is -0,048664.
The sine of 121 is 0,998815.
The tangent of 121 is -20,52489.

Number 121 in Computer Science

Code typeCode value
ASCII Htmly Lowercase y y
(ISO 8859-1 Characters)
Unix timeUnix time 121 is equal to Thursday Jan. 1, 1970, 12:02:01 a.m. GMT
IPv4, IPv6Number 121 internet address in dotted format v4, v6 ::79
121 Decimal = 1111001 Binary
121 Decimal = 11111 Ternary
121 Decimal = 171 Octal
121 Decimal = 79 Hexadecimal (0x79 hex)
121 BASE64MTIx
121 MD54c56ff4ce4aaf9573aa5dff913df997a
121 SHA18bd7954c40c1e59a900f71ea3a266732609915b1
121 SHA2241dc1c160284a5b1d5cbb04f6856c4c34806d33ceee7158b426821beb
121 SHA25689aa1e580023722db67646e8149eb246c748e180e34a1cf679ab0b41a416d904
121 SHA384ca87db07c098d292b5bb910d97c2d7df77c1687ac0639b6d9044b4218e10685769938881758ce261eddaad6b185cdb1c
More SHA codes related to the number 121 ...

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Numerology 121

The meaning of the number 1 (one), numerology 1

Character frequency 1: 2

Number one (1) came to develop or balance creativity, independence, originality, self-reliance and confidence in the world. It reflects power, creative strength, quick mind, drive and ambition. It is the sign of individualistic and aggressive nature.
More about the the number 1 (one), numerology 1 ...

The meaning of the number 2 (two), numerology 2

Character frequency 2: 1

The number two (2) needs above all to feel and to be. It represents the couple, duality, family, private and social life. He/she really enjoys home life and family gatherings. The number 2 denotes a sociable, hospitable, friendly, caring and affectionate person. It is the sign of empathy, cooperation, adaptability, consideration for others, super-sensitivity towards the needs of others.

The number 2 (two) is also the symbol of balance, togetherness and receptivity. He/she is a good partner, colleague or companion; he/she also plays a wonderful role as a referee or mediator. Number 2 person is modest, sincere, spiritually influenced and a good diplomat. It represents intuition and vulnerability.
More about the the number 2 (two), numerology 2 ...

№ 121 in other languages

How to say or write the number one hundred and twenty-one in Spanish, German, French and other languages.
Spanish: 🔊 (número 121)

ciento veintiuno

German: 🔊 (Nummer 121)


French: 🔊 (nombre 121)

cent vingt et un

Portuguese: 🔊 (número 121)

cento e vinte e um

Hindi: 🔊 (संख्या 121)

एक सौ, इक्कीस

Chinese: 🔊 (数 121)


Arabian: 🔊 (عدد 121)

مائة و واحد و عشرون

Czech: 🔊 (číslo 121)

sto dvacet jedna

Korean: 🔊 (번호 121)


Danish: 🔊 (nummer 121)

ethundrede og enogtyve

Hebrew: (מספר 121)

מאה עשרים ואחת

Dutch: 🔊 (nummer 121)


Japanese: 🔊 (数 121)


Indonesian: 🔊 (jumlah 121)

seratus dua puluh satu

Italian: 🔊 (numero 121)


Norwegian: 🔊 (nummer 121)

en hundre og tjueen

Polish: 🔊 (liczba 121)

sto dwadzieścia jeden

Russian: 🔊 (номер 121)

сто двадцать один

Turkish: 🔊 (numara 121)


Thai: 🔊 (จำนวน 121)


Ukrainian: 🔊 (номер 121)

сто двадцять один

Vietnamese: 🔊 (con số 121)

một trăm hai mươi mốt

Other languages ...

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Ayomide Awoniyi   Oct. 25, 2023
121 is palindromic in ternary, octal and decimal. Numbers that have this property:1, 4, and 121.

Frequently asked questions about the number 121

  • How do you write the number 121 in words?

    121 can be written as "one hundred and twenty-one".

Number 121 in News

The Sydney Morning Herald: California fires rage despite cooler temperatures
In Southern California, cooler temperatures and rain brought respite to firefighters battling the massive Fairview Fire about 121 kilometres southeast of Los Angeles.
Sept. 12, 2022
The Sydney Morning Herald: Gina Rinehart, sanctioned by Putin, calls on Australia to ramp up defences
“We urgently need millions of smart mines in our thousands of kilometres of otherwise indefensible oceans,” says the billionaire, one of 121 newly sanctioned Australians.
June 17, 2022
The Sydney Morning Herald: Russia sanctions hundreds of Australians including journalists
Russia’s Foreign Ministry has announced it is sanctioning an additional 121 Australian citizens, including our editors, journalists and Defence officials.
June 17, 2022
CNN: Canadian village heavily damaged by wildfires a day after temperatures topped 121 degrees
A day after a village in British Columbia saw Canada's highest recorded temperature, the town of Lytton suffered extensive damage from a wildfire that led the town's mayor to order residents to evacuate.
July 2, 2021

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