Names of 18121
| Nominal | 18121 |
| Cardinal | eighteen thousand one hundred twenty-one |
| Ordinal | 18,121st |
| This number as US currency | eighteen thousand one hundred twenty-one dollars |
| Is 18121 an odd number? | 18121 is an odd number |
| Is 18121 an even number? | 18121 is NOT an even number |
| Is 18121 a palindrome? | 18121 is NOT a palindrome number |
| Is 18121 a triangle number? | 18121 is NOT a triangle number |
18121 in other Bases
| Base 2 (Binary) | 1000110110010012 |
| Base 3 (Ternary) | 2202120113 |
| Base 4 (Quaternary) | 101230214 |
| Base 5 (Quinary) | 10344415 |
| Base 6 (Senary) | 2155216 |
| Base 8 (Octal) | 433118 |
| Base 12 (Duodecimal) | A5A112 |
| Base 16 (Hexadecimal) | 46C916 |
| Base 20 (Vigesimal) | 256120 |
Primes and Factors tests for 18121
| Is 18121 a Prime Number? | 18121 is a prime |
| Is 18121 a perfect number? | 18121 is NOT a perfect number |
| Is 18121 a Mersenne Prime? | 18121 is NOT a Mersenne prime |
| Is 18121 a Fermat Prime? | 18121 is NOT a Fermat prime |
| Is 18121 a Fibonacci Prime? | 18121 is NOT a Fibonacci prime |
| Is 18121 a Partition Prime? | 18121 is NOT a Partition prime |
| Is 18121 a Pell Prime? | 18121 is NOT a Pell prime |
| Prime Factors | Prime factors of 18121 |
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18121 in other Numerals
| 18121 in Roman Numeral | XVMMMCXXI |
| 18121 in Chinese Numeral | 壹萬捌仟壹佰貳拾壹 |
| 18121 in Egyptian Numeral | 𓂭𓇃𓍢𓎇𓏺 |
| 18121 in Babylonian Numeral |    |
Roots and stuff for 18121
| Is 18121 a square number? | 18121 is NOT a square number |
| Is 18121 a cube number? | 18121 is NOT a cube number |
| Square root of the number 18121 | 134.6142637316 |
| Cube root of the number 18121 | 26.266006866137 |
Recreational math for 18121
| Number 18121 reversed | 12181 |
| Sum of the digits | 13 |
| No of digits | 5 |