xxi

1. The cardinal number that is the sum of twenty and one (synset 113770386)
   is a type of: large integer - an integer equal to or greater than ten
   same as: 21, twenty-one

1. Being one more than twenty (synset 302196070)
   similar to: cardinal - being or denoting a numerical quantity but not order
   same as: 21, twenty-one

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