31213013231102 has 32 divisors (see below), whose sum is σ = 49299693120000. Its totient is φ = 14780316148416.

The previous prime is 31213013231087. The next prime is 31213013231123. The reversal of 31213013231102 is 20113231031213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2906504849 + ... + 2906515587.

It is an arithmetic number, because the mean of its divisors is an integer number (1540615410000).

Almost surely, 2^{31213013231102} is an apocalyptic number.

31213013231102 is a deficient number, since it is larger than the sum of its proper divisors (18086679888898).

31213013231102 is a wasteful number, since it uses less digits than its factorization.

31213013231102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28448.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31213013231102 its reverse (20113231031213), we get a palindrome (51326244262315).

The spelling of 31213013231102 in words is "thirty-one trillion, two hundred thirteen billion, thirteen million, two hundred thirty-one thousand, one hundred two".