31230212112 has 60 divisors (see below), whose sum is σ = 95346788784. Its totient is φ = 9463700160.

The previous prime is 31230212099. The next prime is 31230212113. The reversal of 31230212112 is 21121203213.

31230212112 is a `hidden beast` number, since 312 + 30 + 212 + 112 = 666.

It is a super-2 number, since 2×31230212112² (a number of 22 digits) contains 22 as substring.

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 (31230212113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9856438 + ... + 9859605.

Almost surely, 2^31230212112 is an apocalyptic number.

It is an amenable number.

31230212112 is an abundant number, since it is smaller than the sum of its proper divisors (64116576672).

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

31230212112 is a wasteful number, since it uses less digits than its factorization.

31230212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19716068 (or 19716059 counting only the distinct ones).

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

Adding to 31230212112 its reverse (21121203213), we get a palindrome (52351415325).

It can be divided in two parts, 31230 and 212112, that added together give a palindrome (243342).

The spelling of 31230212112 in words is "thirty-one billion, two hundred thirty million, two hundred twelve thousand, one hundred twelve".