12156352123 has 2 divisors, whose sum is σ = 12156352124. Its totient is φ = 12156352122.

The previous prime is 12156352007. The next prime is 12156352141. The reversal of 12156352123 is 32125365121.

It is a strong prime.

It is an emirp because it is prime and its reverse (32125365121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12156352123 - 2⁹ = 12156351611 is a prime.

It is not a weakly prime, because it can be changed into another prime (12156352823) 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 as a sum of consecutive naturals, namely, 6078176061 + 6078176062.

It is an arithmetic number, because the mean of its divisors is an integer number (6078176062).

Almost surely, 2^12156352123 is an apocalyptic number.

12156352123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156352123 is an equidigital number, since it uses as much as digits as its factorization.

12156352123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The spelling of 12156352123 in words is "twelve billion, one hundred fifty-six million, three hundred fifty-two thousand, one hundred twenty-three".