111311312 has 20 divisors (see below), whose sum is σ = 246475296. Its totient is φ = 47704800.

The previous prime is 111311303. The next prime is 111311341. The reversal of 111311312 is 213113111.

It is a happy number.

It is a super-2 number, since 2×111311312² = 24780416358322688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496814 + ... + 497037.

Almost surely, 2^111311312 is an apocalyptic number.

It is an amenable number.

111311312 is an abundant number, since it is smaller than the sum of its proper divisors (135163984).

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

111311312 is an equidigital number, since it uses as much as digits as its factorization.

111311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993866 (or 993860 counting only the distinct ones).

The product of its digits is 18, while the sum is 14.

The square root of 111311312 is about 10550.4176220660. The cubic root of 111311312 is about 481.0384231707.

Adding to 111311312 its reverse (213113111), we get a palindrome (324424423).

The spelling of 111311312 in words is "one hundred eleven million, three hundred eleven thousand, three hundred twelve".