31213223303120 has 40 divisors (see below), whose sum is σ = 76390257035040. Its totient is φ = 11828168830080.

The previous prime is 31213223303099. The next prime is 31213223303147. The reversal of 31213223303120 is 2130332231213.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 31213223303120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10267506146 + ... + 10267509185.

It is an arithmetic number, because the mean of its divisors is an integer number (1909756425876).

Almost surely, 2^{31213223303120} is an apocalyptic number.

It is an amenable number.

31213223303120 is an abundant number, since it is smaller than the sum of its proper divisors (45177033731920).

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

31213223303120 is a wasteful number, since it uses less digits than its factorization.

31213223303120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20535015363 (or 20535015357 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31213223303120 its reverse (2130332231213), we get a palindrome (33343555534333).

The spelling of 31213223303120 in words is "thirty-one trillion, two hundred thirteen billion, two hundred twenty-three million, three hundred three thousand, one hundred twenty".