31112321022 has 16 divisors (see below), whose sum is σ = 69138491280. Its totient is φ = 10370773656.

The previous prime is 31112320999. The next prime is 31112321047. The reversal of 31112321022 is 22012321113.

31112321022 is a `hidden beast` number, since 311 + 12 + 321 + 0 + 22 = 666.

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 = 31112320986 and 31112321004.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 288076993 + ... + 288077100.

It is an arithmetic number, because the mean of its divisors is an integer number (4321155705).

Almost surely, 2^31112321022 is an apocalyptic number.

31112321022 is an abundant number, since it is smaller than the sum of its proper divisors (38026170258).

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

31112321022 is a wasteful number, since it uses less digits than its factorization.

31112321022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576154104 (or 576154098 counting only the distinct ones).

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

Adding to 31112321022 its reverse (22012321113), we get a palindrome (53124642135).

Subtracting from 31112321022 its reverse (22012321113), we obtain a palindrome (9099999909).

The spelling of 31112321022 in words is "thirty-one billion, one hundred twelve million, three hundred twenty-one thousand, twenty-two".