12239555123 has 2 divisors, whose sum is σ = 12239555124. Its totient is φ = 12239555122.

The previous prime is 12239555113. The next prime is 12239555177. The reversal of 12239555123 is 32155593221.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32155593221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12239555123 is a prime.

It is not a weakly prime, because it can be changed into another prime (12239555113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119777561 + 6119777562.

It is an arithmetic number, because the mean of its divisors is an integer number (6119777562).

Almost surely, 2^12239555123 is an apocalyptic number.

12239555123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12239555123 is an equidigital number, since it uses as much as digits as its factorization.

12239555123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The spelling of 12239555123 in words is "twelve billion, two hundred thirty-nine million, five hundred fifty-five thousand, one hundred twenty-three".