21 Edit 21 is 20 and then a 1 attached to it. he has 2 mouths and 3 eyes. he was made when 3 tried to make 20 with 7 3s. Special Edit 21 is the first number block with 2 faces. Saying Edit Retrieved from "https://number-blocks.fandom.com/wiki/Number_21?oldid=433" Categories: No saying Step squad Not Figured-Out Yet Compound Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.