11 (number)

11 (eleven) is the natural number following 10 and preceding 12. It is the smallest number whose name has three syllables.

← 10 11 12 →
10 12 13 14 15 16 17 18 19 →
0 10 20 30 40 50 60 70 80 90 →
Cardinaleleven
Ordinal11th
(eleventh)
Numeral systemundecimal
Factorizationprime
Prime5th
Divisors1, 11
Greek numeralΙΑ´
Roman numeralXI, xi
Greek prefixhendeca-/hendeka-
Latin prefixundeca-
Binary10112
Ternary1023
Senary156
Octal138
DuodecimalB12
HexadecimalB16
Bangla১১
Hebrew numeralי"א
Devanagari numerals११
Malayalam൰൧
Tamil numeralsகக
Telugu౧౧
Babylonian numeral𒌋𒐕