31311201023102 has 64 divisors (see below), whose sum is σ = 63061929520128. Its totient is φ = 11260484352000.

The previous prime is 31311201023057. The next prime is 31311201023119. The reversal of 31311201023102 is 20132010211313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88052702 + ... + 88407582.

It is an arithmetic number, because the mean of its divisors is an integer number (985342648752).

Almost surely, 2^{31311201023102} is an apocalyptic number.

31311201023102 is an abundant number, since it is smaller than the sum of its proper divisors (31750728497026).

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

31311201023102 is a wasteful number, since it uses less digits than its factorization.

31311201023102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398985.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31311201023102 its reverse (20132010211313), we get a palindrome (51443211234415).

The spelling of 31311201023102 in words is "thirty-one trillion, three hundred eleven billion, two hundred one million, twenty-three thousand, one hundred two".