31113302112 has 72 divisors (see below), whose sum is σ = 88515226800. Its totient is φ = 10366790400.

The previous prime is 31113302083. The next prime is 31113302119. The reversal of 31113302112 is 21120331113.

31113302112 is a `hidden beast` number, since 311 + 1 + 330 + 21 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113302119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 713514 + ... + 755862.

It is an arithmetic number, because the mean of its divisors is an integer number (1229378150).

Almost surely, 2^31113302112 is an apocalyptic number.

31113302112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31113302112 is an abundant number, since it is smaller than the sum of its proper divisors (57401924688).

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

31113302112 is a wasteful number, since it uses less digits than its factorization.

31113302112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44916 (or 44905 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31113302112 its reverse (21120331113), we get a palindrome (52233633225).

The spelling of 31113302112 in words is "thirty-one billion, one hundred thirteen million, three hundred two thousand, one hundred twelve".