31113331312 has 40 divisors (see below), whose sum is σ = 68916018656. Its totient is φ = 13329985536.

The previous prime is 31113331267. The next prime is 31113331357. The reversal of 31113331312 is 21313331113.

It is an interprime number because it is at equal distance from previous prime (31113331267) and next prime (31113331357).

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, 317128 + ... + 403480.

Almost surely, 2^31113331312 is an apocalyptic number.

It is an amenable number.

31113331312 is an abundant number, since it is smaller than the sum of its proper divisors (37802687344).

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

31113331312 is a wasteful number, since it uses less digits than its factorization.

31113331312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89585 (or 89579 counting only the distinct ones).

The product of its digits is 486, while the sum is 22.

Adding to 31113331312 its reverse (21313331113), we get a palindrome (52426662425).

The spelling of 31113331312 in words is "thirty-one billion, one hundred thirteen million, three hundred thirty-one thousand, three hundred twelve".