23821 Full Form. Full Meaning of 23821 Find long form and abbreviation, slang or definition of 23821. What does 23821 mean? What does 23821 stand for? We are providing world largest and most comprehensive acronyms, names, abbreviations database directory on the Internet. Our data base contains more than 8,00,000 terms abbreviations and acronyms. You can also search unique terms more than 4,00,000 general Comprehensive words.