Names of 11
| Nominal | 11 |
| Cardinal | eleven |
| Ordinal | 11th |
| This number as US currency | eleven dollars |
| Is 11 an odd number? | 11 is an odd number |
| Is 11 an even number? | 11 is NOT an even number |
| Is 11 a palindrome? | 11 is a palindrome number |
| Is 11 a triangle number? | 11 is NOT a triangle number |
11 in other Bases
| Base 2 (Binary) | 10112 |
| Base 3 (Ternary) | 1023 |
| Base 4 (Quaternary) | 234 |
| Base 5 (Quinary) | 215 |
| Base 6 (Senary) | 156 |
| Base 8 (Octal) | 138 |
| Base 12 (Duodecimal) | B12 |
| Base 16 (Hexadecimal) | B16 |
| Base 20 (Vigesimal) | B20 |
Primes and Factors tests for 11
| Is 11 a Prime Number? | 11 is a prime |
| Is 11 a perfect number? | 11 is NOT a perfect number |
| Is 11 a Mersenne Prime? | 11 is NOT a Mersenne prime |
| Is 11 a Fermat Prime? | 11 is NOT a Fermat prime |
| Is 11 a Fibonacci Prime? | 11 is NOT a Fibonacci prime |
| Is 11 a Partition Prime? | 11 is a Partition prime |
| Is 11 a Pell Prime? | 11 is NOT a Pell prime |
| Prime Factors | Prime factors of 11 |
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11 in other Numerals
| 11 in Roman Numeral | XI |
| 11 in Chinese Numeral | 壹拾壹 |
| 11 in Egyptian Numeral | 𓎆𓏺 |
| 11 in Babylonian Numeral |  |
Roots and stuff for 11
| Is 11 a square number? | 11 is NOT a square number |
| Is 11 a cube number? | 11 is NOT a cube number |
| Square root of the number 11 | 3.3166247903554 |
| Cube root of the number 11 | 2.2239800905693 |
Recreational math for 11
| Number 11 reversed | 11 |
| Sum of the digits | 2 |
| No of digits | 2 |