123112551423 has 16 divisors (see below), whose sum is σ = 164888085600. Its totient is φ = 81706791936.

The previous prime is 123112551409. The next prime is 123112551431. The reversal of 123112551423 is 324155211321.

It is a happy number.

It is not a de Polignac number, because 123112551423 - 2⁵ = 123112551391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123112551403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550711 + ... + 741287.

It is an arithmetic number, because the mean of its divisors is an integer number (10305505350).

Almost surely, 2^123112551423 is an apocalyptic number.

123112551423 is a deficient number, since it is larger than the sum of its proper divisors (41775534177).

123112551423 is a wasteful number, since it uses less digits than its factorization.

123112551423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191546.

The product of its digits is 7200, while the sum is 30.

Adding to 123112551423 its reverse (324155211321), we get a palindrome (447267762744).

The spelling of 123112551423 in words is "one hundred twenty-three billion, one hundred twelve million, five hundred fifty-one thousand, four hundred twenty-three".