31311121111302 has 128 divisors (see below), whose sum is σ = 66949943040000. Its totient is φ = 9728177988096.

The previous prime is 31311121111261. The next prime is 31311121111349. The reversal of 31311121111302 is 20311112111313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6131017833 + ... + 6131022939.

It is an arithmetic number, because the mean of its divisors is an integer number (523046430000).

Almost surely, 2^{31311121111302} is an apocalyptic number.

31311121111302 is an abundant number, since it is smaller than the sum of its proper divisors (35638821928698).

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

31311121111302 is a wasteful number, since it uses less digits than its factorization.

31311121111302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 31311121111302 its reverse (20311112111313), we get a palindrome (51622233222615).

The spelling of 31311121111302 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, three hundred two".