111112112123 has 4 divisors (see below), whose sum is σ = 111130030968. Its totient is φ = 111094193280.

The previous prime is 111112112113. The next prime is 111112112129. The reversal of 111112112123 is 321211211111.

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 111112112123 - 2¹² = 111112108027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111112112129) 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, 8950118 + ... + 8962523.

It is an arithmetic number, because the mean of its divisors is an integer number (27782507742).

Almost surely, 2^111112112123 is an apocalyptic number.

111112112123 is a deficient number, since it is larger than the sum of its proper divisors (17918845).

111112112123 is an equidigital number, since it uses as much as digits as its factorization.

111112112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17918844.

The product of its digits is 24, while the sum is 17.

Adding to 111112112123 its reverse (321211211111), we get a palindrome (432323323234).

The spelling of 111112112123 in words is "one hundred eleven billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-three".