31320112122 has 48 divisors (see below), whose sum is σ = 74318942880. Its totient is φ = 9473615136.

The previous prime is 31320112099. The next prime is 31320112139. The reversal of 31320112122 is 22121102313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31320112095 and 31320112104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1120488 + ... + 1148099.

It is an arithmetic number, because the mean of its divisors is an integer number (1548311310).

Almost surely, 2^31320112122 is an apocalyptic number.

31320112122 is an abundant number, since it is smaller than the sum of its proper divisors (42998830758).

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

31320112122 is a wasteful number, since it uses less digits than its factorization.

31320112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268667 (or 2268664 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31320112122 its reverse (22121102313), we get a palindrome (53441214435).

The spelling of 31320112122 in words is "thirty-one billion, three hundred twenty million, one hundred twelve thousand, one hundred twenty-two".