111112111123 has 4 divisors (see below), whose sum is σ = 119659196608. Its totient is φ = 102565025640.

The previous prime is 111112111079. The next prime is 111112111141. The reversal of 111112111123 is 321111211111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111112111123 is a prime.

It is a super-2 number, since 2×111112111123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112111097 and 111112111106.

It is not an unprimeable number, because it can be changed into a prime (111112111153) 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, 4273542723 + ... + 4273542748.

It is an arithmetic number, because the mean of its divisors is an integer number (29914799152).

Almost surely, 2^111112111123 is an apocalyptic number.

111112111123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111112111123 is a deficient number, since it is larger than the sum of its proper divisors (8547085485).

111112111123 is an equidigital number, since it uses as much as digits as its factorization.

111112111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547085484.

The product of its digits is 12, while the sum is 16.

Adding to 111112111123 its reverse (321111211111), we get a palindrome (432223322234).

The spelling of 111112111123 in words is "one hundred eleven billion, one hundred twelve million, one hundred eleven thousand, one hundred twenty-three".