12320123129 has 2 divisors, whose sum is σ = 12320123130. Its totient is φ = 12320123128.

The previous prime is 12320123111. The next prime is 12320123143. The reversal of 12320123129 is 92132102321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10568868025 + 1751255104 = 102805^2 + 41848^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320123129 - 2²⁴ = 12303345913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12320123098 and 12320123107.

It is not a weakly prime, because it can be changed into another prime (12320123429) 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, 6160061564 + 6160061565.

It is an arithmetic number, because the mean of its divisors is an integer number (6160061565).

Almost surely, 2^12320123129 is an apocalyptic number.

It is an amenable number.

12320123129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320123129 is an equidigital number, since it uses as much as digits as its factorization.

12320123129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 12320123129 in words is "twelve billion, three hundred twenty million, one hundred twenty-three thousand, one hundred twenty-nine".