12365555123 has 2 divisors, whose sum is σ = 12365555124. Its totient is φ = 12365555122.

The previous prime is 12365555117. The next prime is 12365555201. The reversal of 12365555123 is 32155556321.

12365555123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12365555123 - 2¹⁰ = 12365554099 is a prime.

It is not a weakly prime, because it can be changed into another prime (12365551123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6182777561 + 6182777562.

It is an arithmetic number, because the mean of its divisors is an integer number (6182777562).

Almost surely, 2^12365555123 is an apocalyptic number.

12365555123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12365555123 is an equidigital number, since it uses as much as digits as its factorization.

12365555123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135000, while the sum is 38.

The spelling of 12365555123 in words is "twelve billion, three hundred sixty-five million, five hundred fifty-five thousand, one hundred twenty-three".