21102031232 has 32 divisors (see below), whose sum is σ = 42222838800. Its totient is φ = 10504926720.

The previous prime is 21102031213. The next prime is 21102031267. The reversal of 21102031232 is 23213020112.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 21102031232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330644 + ... + 389267.

Almost surely, 2^21102031232 is an apocalyptic number.

It is an amenable number.

21102031232 is an abundant number, since it is smaller than the sum of its proper divisors (21120807568).

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

21102031232 is an equidigital number, since it uses as much as digits as its factorization.

21102031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720154 (or 720142 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21102031232 its reverse (23213020112), we get a palindrome (44315051344).

The spelling of 21102031232 in words is "twenty-one billion, one hundred two million, thirty-one thousand, two hundred thirty-two".