21031130200 has 48 divisors (see below), whose sum is σ = 48907260360. Its totient is φ = 8410752000.

The previous prime is 21031130177. The next prime is 21031130203. The reversal of 21031130200 is 203113012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031130203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1561495 + ... + 1574905.

Almost surely, 2^21031130200 is an apocalyptic number.

21031130200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031130200 is an abundant number, since it is smaller than the sum of its proper divisors (27876130160).

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

21031130200 is a wasteful number, since it uses less digits than its factorization.

21031130200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21268 (or 21259 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21031130200 its reverse (203113012), we get a palindrome (21234243212).

The spelling of 21031130200 in words is "twenty-one billion, thirty-one million, one hundred thirty thousand, two hundred".