31112130112 has 28 divisors (see below), whose sum is σ = 70557867520. Its totient is φ = 13333769856.

The previous prime is 31112130079. The next prime is 31112130113. The reversal of 31112130112 is 21103121113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (31112130113) 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 3 ways as a sum of consecutive naturals, for example, 34722912 + ... + 34723807.

It is an arithmetic number, because the mean of its divisors is an integer number (2519923840).

Almost surely, 2^31112130112 is an apocalyptic number.

31112130112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31112130112 is an abundant number, since it is smaller than the sum of its proper divisors (39445737408).

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

31112130112 is an equidigital number, since it uses as much as digits as its factorization.

31112130112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69446738 (or 69446728 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31112130112 its reverse (21103121113), we get a palindrome (52215251225).

The spelling of 31112130112 in words is "thirty-one billion, one hundred twelve million, one hundred thirty thousand, one hundred twelve".