111112111111 has 4 divisors (see below), whose sum is σ = 111432319272. Its totient is φ = 110791902952.

The previous prime is 111112111079. The next prime is 111112111141. The reversal of 111112111111 is 111111211111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111112111111 - 2⁵ = 111112111079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112111091 and 111112111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112111141) 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, 160103560 + ... + 160104253.

It is an arithmetic number, because the mean of its divisors is an integer number (27858079818).

Almost surely, 2^111112111111 is an apocalyptic number.

111112111111 is a deficient number, since it is larger than the sum of its proper divisors (320208161).

111112111111 is an equidigital number, since it uses as much as digits as its factorization.

111112111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320208160.

The product of its digits is 2, while the sum is 13.

Adding to 111112111111 its reverse (111111211111), we get a palindrome (222223322222).

The spelling of 111112111111 in words is "one hundred eleven billion, one hundred twelve million, one hundred eleven thousand, one hundred eleven".