21331112032 has 48 divisors (see below), whose sum is σ = 44522654400. Its totient is φ = 10025371648.

The previous prime is 21331112027. The next prime is 21331112041. The reversal of 21331112032 is 23021113312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408969 + ... + 458167.

It is an arithmetic number, because the mean of its divisors is an integer number (927555300).

Almost surely, 2^21331112032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21331112032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22261327200).

21331112032 is an abundant number, since it is smaller than the sum of its proper divisors (23191542368).

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

21331112032 is a wasteful number, since it uses less digits than its factorization.

21331112032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50023 (or 50015 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21331112032 its reverse (23021113312), we get a palindrome (44352225344).

The spelling of 21331112032 in words is "twenty-one billion, three hundred thirty-one million, one hundred twelve thousand, thirty-two".