31013220102 has 32 divisors (see below), whose sum is σ = 65120364288. Its totient is φ = 9827601696.

The previous prime is 31013220097. The next prime is 31013220103. The reversal of 31013220102 is 20102231013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013220103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 666873 + ... + 711860.

It is an arithmetic number, because the mean of its divisors is an integer number (2035011384).

Almost surely, 2^31013220102 is an apocalyptic number.

31013220102 is an abundant number, since it is smaller than the sum of its proper divisors (34107144186).

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

31013220102 is a wasteful number, since it uses less digits than its factorization.

31013220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378924.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31013220102 its reverse (20102231013), we get a palindrome (51115451115).

The spelling of 31013220102 in words is "thirty-one billion, thirteen million, two hundred twenty thousand, one hundred two".