31122313312 has 24 divisors (see below), whose sum is σ = 61278650496. Its totient is φ = 15559481472.

The previous prime is 31122313303. The next prime is 31122313319. The reversal of 31122313312 is 21331322113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122313319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282498 + ... + 376894.

It is an arithmetic number, because the mean of its divisors is an integer number (2553277104).

Almost surely, 2^31122313312 is an apocalyptic number.

31122313312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31122313312 is a deficient number, since it is larger than the sum of its proper divisors (30156337184).

31122313312 is a wasteful number, since it uses less digits than its factorization.

31122313312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104710 (or 104702 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 31122313312 its reverse (21331322113), we get a palindrome (52453635425).

The spelling of 31122313312 in words is "thirty-one billion, one hundred twenty-two million, three hundred thirteen thousand, three hundred twelve".