31120223112 has 256 divisors, whose sum is σ = 98206214400. Its totient is φ = 9047808000.

The previous prime is 31120223093. The next prime is 31120223119. The reversal of 31120223112 is 21132202113.

31120223112 is a `hidden beast` number, since 311 + 20 + 22 + 311 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31120223119) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5939758 + ... + 5944994.

It is an arithmetic number, because the mean of its divisors is an integer number (383618025).

Almost surely, 2^31120223112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31120223112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49103107200).

31120223112 is an abundant number, since it is smaller than the sum of its proper divisors (67085991288).

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

31120223112 is a wasteful number, since it uses less digits than its factorization.

31120223112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365 (or 5355 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31120223112 its reverse (21132202113), we get a palindrome (52252425225).

The spelling of 31120223112 in words is "thirty-one billion, one hundred twenty million, two hundred twenty-three thousand, one hundred twelve".