21001012023032 has 32 divisors (see below), whose sum is σ = 39443203076400. Its totient is φ = 10482838512384.

The previous prime is 21001012023029. The next prime is 21001012023151. The reversal of 21001012023032 is 23032021010012.

It is a self number, because there is not a number n which added to its sum of digits gives 21001012023032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11166038 + ... + 12910554.

Almost surely, 2^{21001012023032} is an apocalyptic number.

It is an amenable number.

21001012023032 is a deficient number, since it is larger than the sum of its proper divisors (18442191053368).

21001012023032 is a wasteful number, since it uses less digits than its factorization.

21001012023032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747055 (or 1747051 counting only the distinct ones).

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

Adding to 21001012023032 its reverse (23032021010012), we get a palindrome (44033033033044).

The spelling of 21001012023032 in words is "twenty-one trillion, one billion, twelve million, twenty-three thousand, thirty-two".