111331222013 has 16 divisors (see below), whose sum is σ = 122307687936. Its totient is φ = 100499835840.

The previous prime is 111331221979. The next prime is 111331222043. The reversal of 111331222013 is 310222133111.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111331222013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111331222043) 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, 830420 + ... + 955122.

It is an arithmetic number, because the mean of its divisors is an integer number (7644230496).

Almost surely, 2^111331222013 is an apocalyptic number.

It is an amenable number.

111331222013 is a deficient number, since it is larger than the sum of its proper divisors (10976465923).

111331222013 is a wasteful number, since it uses less digits than its factorization.

111331222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125284.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 111331222013 its reverse (310222133111), we get a palindrome (421553355124).

The spelling of 111331222013 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred twenty-two thousand, thirteen".