
11 (eleven) (pronounced
/ɨˈlɛvɨn/ or
/iːˈlɛvɛn/) is the
natural number following
10 and preceding
12. It is the first number which cannot be represented by a
human counting his or her eight
fingers and two
thumbs additively (although it can be represented in a variety of other ways using human bodily parts, such as counting additively with the twenty
digits including the
toes, using the thumb to count the finger
phalanges of one hand additively up to twelve, or using the fingers in one hand to count up to fifteen
binarily). Eleven is the smallest positive integer requiring three syllables in English, and it is also the largest prime number with a single-morpheme name in this language (although etymologically the word eleven originated from a Germanic compound *ainlif meaning "one left"
[1]).