21031010031032 has 16 divisors (see below), whose sum is σ = 39440551955640. Its totient is φ = 10513529509536.

The previous prime is 21031010031013. The next prime is 21031010031061. The reversal of 21031010031032 is 23013001013012.

It is a self number, because there is not a number n which added to its sum of digits gives 21031010031032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246893003 + ... + 246978170.

Almost surely, 2^{21031010031032} is an apocalyptic number.

It is an amenable number.

21031010031032 is a deficient number, since it is larger than the sum of its proper divisors (18409541924608).

21031010031032 is a wasteful number, since it uses less digits than its factorization.

21031010031032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493876502 (or 493876498 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21031010031032 its reverse (23013001013012), we get a palindrome (44044011044044).

The spelling of 21031010031032 in words is "twenty-one trillion, thirty-one billion, ten million, thirty-one thousand, thirty-two".