Number
-11
- Negative
- Odd
- 2 digits
-11 is an odd 2-digit integer and the negative of 11. It has 2 divisors and a digital root of 2.
Number properties
ParityOddnot divisible by 2
SignNegative
Absolute value11
Digit count2
Digit sum2
Digital root2repeated digit sum
PalindromicYesreads the same backwards
Factors & divisors
Prime factorisation−1 × 11
Distinct prime factors111
Number of divisors2
Sum of divisors σ(n)12
SquarefreeYesno repeated prime factor
All divisors1, 112 in total
Arithmetic
Representations
Decimal-11
Binary10114 bits
Octal13
HexadecimalB
Base 36B
In wordsminus eleven
Ordinalminus eleventh
Scientific notation-1.1 × 10^1
Engineering notation-11
Powers & multiples
-11 to the power 2121
-11 to the power 3-1,331
-11 to the power 414,641
-11 to the power 5-161,051
First ten multiples-11, -22, -33, -44, -55, -66, -77, -88, -99, -110
Powers of twoBetween 2^3 (8) and 2^4 (16)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 3
Divisible by 5No, remainder 1
Divisible by 6No, remainder 5
Divisible by 7No, remainder 4
Divisible by 8No, remainder 3
Divisible by 9No, remainder 2
Divisible by 10No, remainder 1
Divisible by 11Yes
Divisible by 12No, remainder 11
Divisible by 100No, remainder 11
As a percentage & fraction
As a percentage-1,100%
-11% as a decimal-0.11
-11% of 100-11
-11% of 1,000-110
As a fraction of 100-11/100
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