Names of 81221
| Nominal | 81221 |
| Cardinal | eighty-one thousand two hundred twenty-one |
| Ordinal | 81,221st |
| This number as US currency | eighty-one thousand two hundred twenty-one dollars |
| Is 81221 an odd number? | 81221 is an odd number |
| Is 81221 an even number? | 81221 is NOT an even number |
| Is 81221 a palindrome? | 81221 is NOT a palindrome number |
| Is 81221 a triangle number? | 81221 is NOT a triangle number |
81221 in other Bases
| Base 2 (Binary) | 100111101010001012 |
| Base 3 (Ternary) | 110101020123 |
| Base 4 (Quaternary) | 1033110114 |
| Base 5 (Quinary) | 100443415 |
| Base 6 (Senary) | 14240056 |
| Base 8 (Octal) | 2365058 |
| Base 12 (Duodecimal) | 3B00512 |
| Base 16 (Hexadecimal) | 13D4516 |
| Base 20 (Vigesimal) | A31120 |
Primes and Factors tests for 81221
| Is 81221 a Prime Number? | 81221 is NOT a prime |
| Is 81221 a perfect number? | 81221 is NOT a perfect number |
| Is 81221 a Mersenne Prime? | 81221 is NOT a Mersenne prime |
| Is 81221 a Fermat Prime? | 81221 is NOT a Fermat prime |
| Is 81221 a Fibonacci Prime? | 81221 is NOT a Fibonacci prime |
| Is 81221 a Partition Prime? | 81221 is NOT a Partition prime |
| Is 81221 a Pell Prime? | 81221 is NOT a Pell prime |
| Prime Factors | Prime factors of 81221 |
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81221 in other Numerals
| 81221 in Roman Numeral | LXXXMCCXXI |
| 81221 in Chinese Numeral | 捌萬壹仟貳佰貳拾壹 |
| 81221 in Egyptian Numeral | 𓂴𓆼𓍣𓎇𓏺 |
| 81221 in Babylonian Numeral |    |
Roots and stuff for 81221
| Is 81221 a square number? | 81221 is NOT a square number |
| Is 81221 a cube number? | 81221 is NOT a cube number |
| Square root of the number 81221 | 284.99298236974 |
| Cube root of the number 81221 | 43.306801641733 |
Recreational math for 81221
| Number 81221 reversed | 12218 |
| Sum of the digits | 14 |
| No of digits | 5 |