111111111122113 has 4 divisors (see below), whose sum is σ = 112189859773888. Its totient is φ = 110032362470340.

The previous prime is 111111111122093. The next prime is 111111111122161. The reversal of 111111111122113 is 311221111111111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111111122113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111111522113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539374325733 + ... + 539374325938.

It is an arithmetic number, because the mean of its divisors is an integer number (28047464943472).

Almost surely, 2^{111111111122113} is an apocalyptic number.

It is an amenable number.

111111111122113 is a deficient number, since it is larger than the sum of its proper divisors (1078748651775).

111111111122113 is a wasteful number, since it uses less digits than its factorization.

111111111122113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078748651774.

The product of its digits is 12, while the sum is 19.

Adding to 111111111122113 its reverse (311221111111111), we get a palindrome (422332222233224).

The spelling of 111111111122113 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty-two thousand, one hundred thirteen".