21100232224432 has 40 divisors (see below), whose sum is σ = 44082962728560. Its totient is φ = 9751070085120.

The previous prime is 21100232224381. The next prime is 21100232224439. The reversal of 21100232224432 is 23442223200112.

It is a self number, because there is not a number n which added to its sum of digits gives 21100232224432.

It is not an unprimeable number, because it can be changed into a prime (21100232224439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846434593 + ... + 846459520.

It is an arithmetic number, because the mean of its divisors is an integer number (1102074068214).

Almost surely, 2^{21100232224432} is an apocalyptic number.

It is an amenable number.

21100232224432 is an abundant number, since it is smaller than the sum of its proper divisors (22982730504128).

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

21100232224432 is a wasteful number, since it uses less digits than its factorization.

21100232224432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692894181 (or 1692894175 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21100232224432 its reverse (23442223200112), we get a palindrome (44542455424544).

The spelling of 21100232224432 in words is "twenty-one trillion, one hundred billion, two hundred thirty-two million, two hundred twenty-four thousand, four hundred thirty-two".