31313200213122 has 16 divisors (see below), whose sum is σ = 62626469185632. Its totient is φ = 10437721944480.

The previous prime is 31313200213093. The next prime is 31313200213123. The reversal of 31313200213122 is 22131200231313.

It is a junction number, because it is equal to n+sod(n) for n = 31313200213092 and 31313200213101.

It is not an unprimeable number, because it can be changed into a prime (31313200213123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4519293 + ... + 9113199.

It is an arithmetic number, because the mean of its divisors is an integer number (3914154324102).

Almost surely, 2^{31313200213122} is an apocalyptic number.

31313200213122 is an abundant number, since it is smaller than the sum of its proper divisors (31313268972510).

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

31313200213122 is a wasteful number, since it uses less digits than its factorization.

31313200213122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729953.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31313200213122 its reverse (22131200231313), we get a palindrome (53444400444435).

The spelling of 31313200213122 in words is "thirty-one trillion, three hundred thirteen billion, two hundred million, two hundred thirteen thousand, one hundred twenty-two".