111123000123 has 4 divisors (see below), whose sum is σ = 148164000168. Its totient is φ = 74082000080.

The previous prime is 111123000091. The next prime is 111123000143. The reversal of 111123000123 is 321000321111.

It is a happy number.

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 111123000123 - 2⁵ = 111123000091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111123000143) 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, 18520500018 + ... + 18520500023.

It is an arithmetic number, because the mean of its divisors is an integer number (37041000042).

Almost surely, 2^111123000123 is an apocalyptic number.

111123000123 is a deficient number, since it is larger than the sum of its proper divisors (37041000045).

111123000123 is an equidigital number, since it uses as much as digits as its factorization.

111123000123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37041000044.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 111123000123 its reverse (321000321111), we get a palindrome (432123321234).

The spelling of 111123000123 in words is "one hundred eleven billion, one hundred twenty-three million, one hundred twenty-three", and thus it is an aban number.