113111111321 has 16 divisors (see below), whose sum is σ = 126355891200. Its totient is φ = 100535093568.

The previous prime is 113111111317. The next prime is 113111111357. The reversal of 113111111321 is 123111111311.

It is a happy number.

It is not a de Polignac number, because 113111111321 - 2² = 113111111317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113111111321.

It is not an unprimeable number, because it can be changed into a prime (113111111371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270401 + ... + 547118.

It is an arithmetic number, because the mean of its divisors is an integer number (7897243200).

Almost surely, 2^113111111321 is an apocalyptic number.

It is an amenable number.

113111111321 is a deficient number, since it is larger than the sum of its proper divisors (13244779879).

113111111321 is a wasteful number, since it uses less digits than its factorization.

113111111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817928.

The product of its digits is 18, while the sum is 17.

Adding to 113111111321 its reverse (123111111311), we get a palindrome (236222222632).

The spelling of 113111111321 in words is "one hundred thirteen billion, one hundred eleven million, one hundred eleven thousand, three hundred twenty-one".