31102311021320 has 64 divisors (see below), whose sum is σ = 87248041315200. Its totient is φ = 9694226810880.

The previous prime is 31102311021307. The next prime is 31102311021401. The reversal of 31102311021320 is 2312011320113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31102311021292 and 31102311021301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5049073385 + ... + 5049079544.

It is an arithmetic number, because the mean of its divisors is an integer number (1363250645550).

Almost surely, 2^{31102311021320} is an apocalyptic number.

It is an amenable number.

31102311021320 is an abundant number, since it is smaller than the sum of its proper divisors (56145730293880).

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

31102311021320 is a wasteful number, since it uses less digits than its factorization.

31102311021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10098152958 (or 10098152954 counting only the distinct ones).

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

Adding to 31102311021320 its reverse (2312011320113), we get a palindrome (33414322341433).

The spelling of 31102311021320 in words is "thirty-one trillion, one hundred two billion, three hundred eleven million, twenty-one thousand, three hundred twenty".