123111423 has 6 divisors (see below), whose sum is σ = 177827624. Its totient is φ = 82074276.

The previous prime is 123111389. The next prime is 123111427. The reversal of 123111423 is 324111321.

123111423 is a `hidden beast` number, since 1 + 231 + 11 + 423 = 666.

It is not a de Polignac number, because 123111423 - 2⁸ = 123111167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123111396 and 123111405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123111427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6839515 + ... + 6839532.

Almost surely, 2^123111423 is an apocalyptic number.

123111423 is a deficient number, since it is larger than the sum of its proper divisors (54716201).

123111423 is a wasteful number, since it uses less digits than its factorization.

123111423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13679053 (or 13679050 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 123111423 is about 11095.5587060769. The cubic root of 123111423 is about 497.4691081211.

Adding to 123111423 its reverse (324111321), we get a palindrome (447222744).

The spelling of 123111423 in words is "one hundred twenty-three million, one hundred eleven thousand, four hundred twenty-three".