21101031123232 has 24 divisors (see below), whose sum is σ = 43986340614636. Its totient is φ = 9929896998912.

The previous prime is 21101031123229. The next prime is 21101031123241. The reversal of 21101031123232 is 23232113010112.

It can be written as a sum of positive squares in 2 ways, for example, as 16293203082256 + 4807828040976 = 4036484^2 + 2192676^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19394329533 + ... + 19394330620.

Almost surely, 2^{21101031123232} is an apocalyptic number.

It is an amenable number.

21101031123232 is an abundant number, since it is smaller than the sum of its proper divisors (22885309491404).

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

21101031123232 is a wasteful number, since it uses less digits than its factorization.

21101031123232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38788660180 (or 38788660172 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21101031123232 its reverse (23232113010112), we get a palindrome (44333144133344).

The spelling of 21101031123232 in words is "twenty-one trillion, one hundred one billion, thirty-one million, one hundred twenty-three thousand, two hundred thirty-two".