12123451323 has 6 divisors (see below), whose sum is σ = 17511651924. Its totient is φ = 8082300876.

The previous prime is 12123451313. The next prime is 12123451337. The reversal of 12123451323 is 32315432121.

12123451323 is a `hidden beast` number, since 1 + 2 + 123 + 4 + 513 + 23 = 666.

It is not a de Polignac number, because 12123451323 - 2⁶ = 12123451259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12123451303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673525065 + ... + 673525082.

It is an arithmetic number, because the mean of its divisors is an integer number (2918608654).

Almost surely, 2^12123451323 is an apocalyptic number.

12123451323 is a deficient number, since it is larger than the sum of its proper divisors (5388200601).

12123451323 is a wasteful number, since it uses less digits than its factorization.

12123451323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347050153 (or 1347050150 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

Adding to 12123451323 its reverse (32315432121), we get a palindrome (44438883444).

The spelling of 12123451323 in words is "twelve billion, one hundred twenty-three million, four hundred fifty-one thousand, three hundred twenty-three".