31020420112 has 40 divisors (see below), whose sum is σ = 65737221120. Its totient is φ = 14063345280.

The previous prime is 31020420059. The next prime is 31020420131. The reversal of 31020420112 is 21102402013.

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

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, 162687 + ... + 297502.

It is an arithmetic number, because the mean of its divisors is an integer number (1643430528).

Almost surely, 2^31020420112 is an apocalyptic number.

It is an amenable number.

31020420112 is an abundant number, since it is smaller than the sum of its proper divisors (34716801008).

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

31020420112 is a wasteful number, since it uses less digits than its factorization.

31020420112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460591 (or 460585 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31020420112 its reverse (21102402013), we get a palindrome (52122822125).

The spelling of 31020420112 in words is "thirty-one billion, twenty million, four hundred twenty thousand, one hundred twelve".