12421442129 has 2 divisors, whose sum is σ = 12421442130. Its totient is φ = 12421442128.

The previous prime is 12421442083. The next prime is 12421442167. The reversal of 12421442129 is 92124412421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11617606225 + 803835904 = 107785^2 + 28352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421442129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12421442095 and 12421442104.

It is not a weakly prime, because it can be changed into another prime (12421442179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210721064 + 6210721065.

It is an arithmetic number, because the mean of its divisors is an integer number (6210721065).

Almost surely, 2^12421442129 is an apocalyptic number.

It is an amenable number.

12421442129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421442129 is an equidigital number, since it uses as much as digits as its factorization.

12421442129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The spelling of 12421442129 in words is "twelve billion, four hundred twenty-one million, four hundred forty-two thousand, one hundred twenty-nine".