111312311 has 8 divisors (see below), whose sum is σ = 128574864. Its totient is φ = 95240320.

The previous prime is 111312307. The next prime is 111312361. The reversal of 111312311 is 113213111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111312311 - 2² = 111312307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111312301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297440 + ... + 297813.

It is an arithmetic number, because the mean of its divisors is an integer number (16071858).

Almost surely, 2^111312311 is an apocalyptic number.

111312311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111312311 is a deficient number, since it is larger than the sum of its proper divisors (17262553).

111312311 is a wasteful number, since it uses less digits than its factorization.

111312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595281.

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

The square root of 111312311 is about 10550.4649660572. The cubic root of 111312311 is about 481.0398622456.

Adding to 111312311 its reverse (113213111), we get a palindrome (224525422).

The spelling of 111312311 in words is "one hundred eleven million, three hundred twelve thousand, three hundred eleven".