1221
Everything about the number 1221 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 1221
| Nominal | 1221 |
| Cardinal | one thousand two hundred twenty-one |
| Ordinal | 1,221st |
| This number as US currency | one thousand two hundred twenty-one dollars |
Properties (and some facts) of 1221
| Is 1221 an odd number? | 1221 is an odd number |
| Is 1221 an even number? | 1221 is not an even number |
| Is 1221 a palindrome? | 1221 is a palindrome |
| Is 1221 a triangle number? | 1221 is not a triangle number |
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1221 in other bases
| Base 2 (Binary) | 10011000101 |
| Base 3 (Ternary) | 1200020 |
| Base 4 (Quaternary) | 103011 |
| Base 5 (Quinary) | 14341 |
| Base 6 (Senary) | 5353 |
| Base 8 (Octal) | 2305 |
| Base 12 (Duodecimal) | 859 |
| Base 16 (Hexadecimal) | 4C5 |
| Base 20 (Vigesimal) | 311 |
Primes and factors tests for 1221
| Is 1221 a prime number? | 1221 is not a prime number |
| Is 1221 a perfect number? | 1221 is not a perfect number |
| Is 1221 a Mersenne prime? | 1221 is not a Mersenne prime |
| Is 1221 a Fermat prime? | 1221 is not a Fermat prime |
| Is 1221 a Fibonacci prime? | 1221 is not a Fibonacci prime |
| Is 1221 a partition prime? | 1221 is not a partition prime |
| Is 1221 a Pell prime? | 1221 is not a Pell prime |
| Prime Factors | Prime factors of 1221 |
1221 in other numeral systems
| 1221 in Roman numerals | MCCXXI |
| 1221 in Chinese numerals | 壹仟貳佰貳拾壹 |
| 1221 in Babylonian numerals |   |
| 1221 in Egyptian numerals | 𓆼𓍣𓎇𓏺 |
Roots and squares for 1221
| Is 1221 a square number? | 1221 is not a square number |
| Is 1221 a cube number? | 1221 is not a cube number |
| Square root of 1221 | 34.942810419312 |
| Cube root of 1221 | 10.688215984317 |
Recreational math for 1221
| Number 1221 reversed | 1221 |
| Sum of the digits | 6 |
| Number of digits | 4 |
Arithmetic tables for 1221
Other pages about 1221
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