Names of 121
| Nominal | 121 |
| Cardinal | one hundred twenty-one |
| Ordinal | 121st |
| This number as US currency | one hundred twenty-one dollars |
| Is 121 an odd number? | 121 is an odd number |
| Is 121 an even number? | 121 is NOT an even number |
| Is 121 a palindrome? | 121 is a palindrome number |
| Is 121 a triangle number? | 121 is NOT a triangle number |
121 in other Bases
| Base 2 (Binary) | 11110012 |
| Base 3 (Ternary) | 111113 |
| Base 4 (Quaternary) | 13214 |
| Base 5 (Quinary) | 4415 |
| Base 6 (Senary) | 3216 |
| Base 8 (Octal) | 1718 |
| Base 12 (Duodecimal) | A112 |
| Base 16 (Hexadecimal) | 7916 |
| Base 20 (Vigesimal) | 6120 |
Primes and Factors tests for 121
| Is 121 a Prime Number? | 121 is NOT a prime |
| Is 121 a perfect number? | 121 is NOT a perfect number |
| Is 121 a Mersenne Prime? | 121 is NOT a Mersenne prime |
| Is 121 a Fermat Prime? | 121 is NOT a Fermat prime |
| Is 121 a Fibonacci Prime? | 121 is NOT a Fibonacci prime |
| Is 121 a Partition Prime? | 121 is NOT a Partition prime |
| Is 121 a Pell Prime? | 121 is NOT a Pell prime |
| Prime Factors | Prime factors of 121 |
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121 in other Numerals
| 121 in Roman Numeral | CXXI |
| 121 in Chinese Numeral | 壹佰貳拾壹 |
| 121 in Egyptian Numeral | 𓍢𓎇𓏺 |
| 121 in Babylonian Numeral |   |
Roots and stuff for 121
| Is 121 a square number? | 121 is a square number |
| Is 121 a cube number? | 121 is NOT a cube number |
| Square root of the number 121 | 11 |
| Cube root of the number 121 | 4.9460874432487 |
Recreational math for 121
| Number 121 reversed | 121 |
| Sum of the digits | 4 |
| No of digits | 3 |