21200131032 has 64 divisors (see below), whose sum is σ = 53182344960. Its totient is φ = 7042492800.

The previous prime is 21200131019. The next prime is 21200131033. The reversal of 21200131032 is 23013100212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200131033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11705407 + ... + 11707217.

It is an arithmetic number, because the mean of its divisors is an integer number (830974140).

Almost surely, 2^21200131032 is an apocalyptic number.

It is an amenable number.

21200131032 is an abundant number, since it is smaller than the sum of its proper divisors (31982213928).

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

21200131032 is a wasteful number, since it uses less digits than its factorization.

21200131032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3220 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21200131032 its reverse (23013100212), we get a palindrome (44213231244).

The spelling of 21200131032 in words is "twenty-one billion, two hundred million, one hundred thirty-one thousand, thirty-two".