12103112123 has 4 divisors (see below), whose sum is σ = 12103359408. Its totient is φ = 12102864840.

The previous prime is 12103112117. The next prime is 12103112167. The reversal of 12103112123 is 32121130121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32121130121 = 6353 ⋅5056057.

It is a cyclic number.

It is not a de Polignac number, because 12103112123 - 2³⁰ = 11029370299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12103112113) 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, 22823 + ... + 157248.

It is an arithmetic number, because the mean of its divisors is an integer number (3025839852).

Almost surely, 2^12103112123 is an apocalyptic number.

12103112123 is a deficient number, since it is larger than the sum of its proper divisors (247285).

12103112123 is an equidigital number, since it uses as much as digits as its factorization.

12103112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247284.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12103112123 its reverse (32121130121), we get a palindrome (44224242244).

The spelling of 12103112123 in words is "twelve billion, one hundred three million, one hundred twelve thousand, one hundred twenty-three".