31331311102 has 32 divisors (see below), whose sum is σ = 59836996800. Its totient is φ = 11967395328.

The previous prime is 31331311097. The next prime is 31331311153. The reversal of 31331311102 is 20111313313.

It is a self number, because there is not a number n which added to its sum of digits gives 31331311102.

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, 2962827 + ... + 2973382.

It is an arithmetic number, because the mean of its divisors is an integer number (1869906150).

Almost surely, 2^31331311102 is an apocalyptic number.

31331311102 is a deficient number, since it is larger than the sum of its proper divisors (28505685698).

31331311102 is a wasteful number, since it uses less digits than its factorization.

31331311102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936260.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31331311102 its reverse (20111313313), we get a palindrome (51442624415).

It can be divided in two parts, 313313 and 11102, that added together give a triangular number (324415 = T₈₀₅).

The spelling of 31331311102 in words is "thirty-one billion, three hundred thirty-one million, three hundred eleven thousand, one hundred two".