11

11 (eleven) is a positive integer following 10 and preceding 12. Its ordinal form is written "11th" or "eleventh."

11 is an.

11 is the first number which cannot be with a 's ten, using each finger as a tally mark. In English, it is the smallest positive integer requiring three syllables and the largest prime number with a single-morpheme name. Its etymology originates from a Germanic compound ainlif meaning "one left".