31120402112 has 28 divisors (see below), whose sum is σ = 61922863200. Its totient is φ = 15517790976.

The previous prime is 31120402111. The next prime is 31120402121. The reversal of 31120402112 is 21120402113.

It is a super-2 number, since 2×31120402112² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31120402111) 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, 638987 + ... + 685962.

Almost surely, 2^31120402112 is an apocalyptic number.

31120402112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31120402112 is a deficient number, since it is larger than the sum of its proper divisors (30802461088).

31120402112 is a wasteful number, since it uses less digits than its factorization.

31120402112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325328 (or 1325318 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31120402112 its reverse (21120402113), we get a palindrome (52240804225).

Subtracting from 31120402112 its reverse (21120402113), we obtain a palindrome (9999999999).

The spelling of 31120402112 in words is "thirty-one billion, one hundred twenty million, four hundred two thousand, one hundred twelve".