Names of 81121
| Nominal | 81121 |
| Cardinal | eighty-one thousand one hundred twenty-one |
| Ordinal | 81,121st |
| This number as US currency | eighty-one thousand one hundred twenty-one dollars |
| Is 81121 an odd number? | 81121 is an odd number |
| Is 81121 an even number? | 81121 is NOT an even number |
| Is 81121 a palindrome? | 81121 is NOT a palindrome number |
| Is 81121 a triangle number? | 81121 is NOT a triangle number |
81121 in other Bases
| Base 2 (Binary) | 100111100111000012 |
| Base 3 (Ternary) | 110100211113 |
| Base 4 (Quaternary) | 1033032014 |
| Base 5 (Quinary) | 100434415 |
| Base 6 (Senary) | 14233216 |
| Base 8 (Octal) | 2363418 |
| Base 12 (Duodecimal) | 3AB4112 |
| Base 16 (Hexadecimal) | 13CE116 |
| Base 20 (Vigesimal) | A2G120 |
Primes and Factors tests for 81121
| Is 81121 a Prime Number? | 81121 is NOT a prime |
| Is 81121 a perfect number? | 81121 is NOT a perfect number |
| Is 81121 a Mersenne Prime? | 81121 is NOT a Mersenne prime |
| Is 81121 a Fermat Prime? | 81121 is NOT a Fermat prime |
| Is 81121 a Fibonacci Prime? | 81121 is NOT a Fibonacci prime |
| Is 81121 a Partition Prime? | 81121 is NOT a Partition prime |
| Is 81121 a Pell Prime? | 81121 is NOT a Pell prime |
| Prime Factors | Prime factors of 81121 |
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81121 in other Numerals
| 81121 in Roman Numeral | LXXXMCXXI |
| 81121 in Chinese Numeral | 捌萬壹仟壹佰貳拾壹 |
| 81121 in Egyptian Numeral | 𓂴𓆼𓍢𓎇𓏺 |
| 81121 in Babylonian Numeral |    |
Roots and stuff for 81121
| Is 81121 a square number? | 81121 is NOT a square number |
| Is 81121 a cube number? | 81121 is NOT a cube number |
| Square root of the number 81121 | 284.81748541829 |
| Cube root of the number 81121 | 43.289021105893 |
Recreational math for 81121
| Number 81121 reversed | 12118 |
| Sum of the digits | 13 |
| No of digits | 5 |