21213303200 has 72 divisors (see below), whose sum is σ = 52289965728. Its totient is φ = 8402906880.

The previous prime is 21213303197. The next prime is 21213303229. The reversal of 21213303200 is 230331212.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46322 + ... + 211121.

It is an arithmetic number, because the mean of its divisors is an integer number (726249524).

Almost surely, 2^21213303200 is an apocalyptic number.

21213303200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213303200 is an abundant number, since it is smaller than the sum of its proper divisors (31076662528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21213303200 is a wasteful number, since it uses less digits than its factorization.

21213303200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257566 (or 257553 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21213303200 its reverse (230331212), we get a palindrome (21443634412).

The spelling of 21213303200 in words is "twenty-one billion, two hundred thirteen million, three hundred three thousand, two hundred".