Names of 2011
| Nominal | 2011 |
| Cardinal | two thousand eleven |
| Ordinal | 2,011th |
| This number as US currency | two thousand eleven dollars |
| Is 2011 an odd number? | 2011 is an odd number |
| Is 2011 an even number? | 2011 is NOT an even number |
| Is 2011 a palindrome? | 2011 is NOT a palindrome number |
| Is 2011 a triangle number? | 2011 is NOT a triangle number |
2011 in other Bases
| Base 2 (Binary) | 111110110112 |
| Base 3 (Ternary) | 22021113 |
| Base 4 (Quaternary) | 1331234 |
| Base 5 (Quinary) | 310215 |
| Base 6 (Senary) | 131516 |
| Base 8 (Octal) | 37338 |
| Base 12 (Duodecimal) | 11B712 |
| Base 16 (Hexadecimal) | 7DB16 |
| Base 20 (Vigesimal) | 50B20 |
Primes and Factors tests for 2011
| Is 2011 a Prime Number? | 2011 is a prime |
| Is 2011 a perfect number? | 2011 is NOT a perfect number |
| Is 2011 a Mersenne Prime? | 2011 is NOT a Mersenne prime |
| Is 2011 a Fermat Prime? | 2011 is NOT a Fermat prime |
| Is 2011 a Fibonacci Prime? | 2011 is NOT a Fibonacci prime |
| Is 2011 a Partition Prime? | 2011 is NOT a Partition prime |
| Is 2011 a Pell Prime? | 2011 is NOT a Pell prime |
| Prime Factors | Prime factors of 2011 |
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2011 in other Numerals
| 2011 in Roman Numeral | MMXI |
| 2011 in Chinese Numeral | 貳仟壹拾壹 |
| 2011 in Egyptian Numeral | 𓆽𓎆𓏺 |
| 2011 in Babylonian Numeral |   |
Roots and stuff for 2011
| Is 2011 a square number? | 2011 is NOT a square number |
| Is 2011 a cube number? | 2011 is NOT a cube number |
| Square root of the number 2011 | 44.844174649557 |
| Cube root of the number 2011 | 12.622266833106 |
Recreational math for 2011
| Number 2011 reversed | 1102 |
| Sum of the digits | 4 |
| No of digits | 4 |