31311012102 has 32 divisors (see below), whose sum is σ = 65028186720. Its totient is φ = 10042951680.

The previous prime is 31311012101. The next prime is 31311012107. The reversal of 31311012102 is 20121011313.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311012101) 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, 853827 + ... + 889742.

It is an arithmetic number, because the mean of its divisors is an integer number (2032130835).

Almost surely, 2^31311012102 is an apocalyptic number.

31311012102 is an abundant number, since it is smaller than the sum of its proper divisors (33717174618).

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

31311012102 is a wasteful number, since it uses less digits than its factorization.

31311012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743688.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31311012102 its reverse (20121011313), we get a palindrome (51432023415).

The spelling of 31311012102 in words is "thirty-one billion, three hundred eleven million, twelve thousand, one hundred two".