31112210112 has 56 divisors (see below), whose sum is σ = 82330722816. Its totient is φ = 10369099008.

The previous prime is 31112210093. The next prime is 31112210183. The reversal of 31112210112 is 21101221113.

It is a junction number, because it is equal to n+sod(n) for n = 31112210091 and 31112210100.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2201533 + ... + 2215619.

Almost surely, 2^31112210112 is an apocalyptic number.

31112210112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31112210112 is an abundant number, since it is smaller than the sum of its proper divisors (51218512704).

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

31112210112 is a wasteful number, since it uses less digits than its factorization.

31112210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25605 (or 25595 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31112210112 its reverse (21101221113), we get a palindrome (52213431225).

The spelling of 31112210112 in words is "thirty-one billion, one hundred twelve million, two hundred ten thousand, one hundred twelve".