111211331112 has 48 divisors (see below), whose sum is σ = 344225550240. Its totient is φ = 31774665888.

The previous prime is 111211331111. The next prime is 111211331137. The reversal of 111211331112 is 211133112111.

111211331112 is a `hidden beast` number, since 1 + 11 + 211 + 331 + 112 = 666.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (111211331111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110328198 + ... + 110329205.

It is an arithmetic number, because the mean of its divisors is an integer number (7171365630).

Almost surely, 2^111211331112 is an apocalyptic number.

111211331112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111211331112 is an abundant number, since it is smaller than the sum of its proper divisors (233014219128).

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

111211331112 is a wasteful number, since it uses less digits than its factorization.

111211331112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220657422 (or 220657415 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

Adding to 111211331112 its reverse (211133112111), we get a palindrome (322344443223).

The spelling of 111211331112 in words is "one hundred eleven billion, two hundred eleven million, three hundred thirty-one thousand, one hundred twelve".