21100330031232 has 64 divisors (see below), whose sum is σ = 56082630542400. Its totient is φ = 7029066384384.

The previous prime is 21100330031177. The next prime is 21100330031237. The reversal of 21100330031232 is 23213003300112.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×21100330031232² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100330031199 and 21100330031208.

It is not an unprimeable number, because it can be changed into a prime (21100330031237) 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, 16479607 + ... + 17713782.

It is an arithmetic number, because the mean of its divisors is an integer number (876291102225).

Almost surely, 2^{21100330031232} is an apocalyptic number.

It is an amenable number.

21100330031232 is an abundant number, since it is smaller than the sum of its proper divisors (34982300511168).

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

21100330031232 is a wasteful number, since it uses less digits than its factorization.

21100330031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34195013 (or 34195001 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21100330031232 its reverse (23213003300112), we get a palindrome (44313333331344).

The spelling of 21100330031232 in words is "twenty-one trillion, one hundred billion, three hundred thirty million, thirty-one thousand, two hundred thirty-two".