31120434112 has 56 divisors (see below), whose sum is σ = 63331709760. Its totient is φ = 15165603840.

The previous prime is 31120434047. The next prime is 31120434127. The reversal of 31120434112 is 21143402113.

It is a congruent number.

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, 703464 + ... + 746392.

Almost surely, 2^31120434112 is an apocalyptic number.

31120434112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31120434112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31665854880).

31120434112 is an abundant number, since it is smaller than the sum of its proper divisors (32211275648).

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

31120434112 is a wasteful number, since it uses less digits than its factorization.

31120434112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43229 (or 43219 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31120434112 its reverse (21143402113), we get a palindrome (52263836225).

The spelling of 31120434112 in words is "thirty-one billion, one hundred twenty million, four hundred thirty-four thousand, one hundred twelve".