111031312212 has 36 divisors (see below), whose sum is σ = 288247959636. Its totient is φ = 36010154880.

The previous prime is 111031312181. The next prime is 111031312213. The reversal of 111031312212 is 212213130111.

111031312212 is a `hidden beast` number, since 1 + 110 + 31 + 312 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 71029712196 + 40001600016 = 266514^2 + 200004^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111031312213) 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, 41677089 + ... + 41679752.

Almost surely, 2^111031312212 is an apocalyptic number.

111031312212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111031312212 is an abundant number, since it is smaller than the sum of its proper divisors (177216647424).

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

111031312212 is a wasteful number, since it uses less digits than its factorization.

111031312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83356888 (or 83356883 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111031312212 its reverse (212213130111), we get a palindrome (323244442323).

The spelling of 111031312212 in words is "one hundred eleven billion, thirty-one million, three hundred twelve thousand, two hundred twelve".