123111231232123 has 4 divisors (see below), whose sum is σ = 123306336195088. Its totient is φ = 122916126269160.

The previous prime is 123111231232021. The next prime is 123111231232141. The reversal of 123111231232123 is 321232132111321.

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 123111231232123 - 2³⁷ = 122973792278651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123111231232091 and 123111231232100.

It is not an unprimeable number, because it can be changed into a prime (123111231232823) 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, 97552480536 + ... + 97552481797.

It is an arithmetic number, because the mean of its divisors is an integer number (30826584048772).

Almost surely, 2^{123111231232123} is an apocalyptic number.

123111231232123 is a deficient number, since it is larger than the sum of its proper divisors (195104962965).

123111231232123 is an equidigital number, since it uses as much as digits as its factorization.

123111231232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195104962964.

The product of its digits is 2592, while the sum is 28.

Adding to 123111231232123 its reverse (321232132111321), we get a palindrome (444343363343444).

The spelling of 123111231232123 in words is "one hundred twenty-three trillion, one hundred eleven billion, two hundred thirty-one million, two hundred thirty-two thousand, one hundred twenty-three".