Adding to 21214036503460 its reverse (6430563041212), we get a palindrome (27644599544672).
Almost surely, 221214036503460 is an apocalyptic number.
21214036503460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21214036503460 is a wasteful number, since it uses less digits than its factorization.
21214036503460 is an odious number, because the sum of its binary digits is odd.
The spelling of 21214036503460 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred three thousand, four hundred sixty".