12428905217 has 2 divisors, whose sum is σ = 12428905218. Its totient is φ = 12428905216.

The previous prime is 12428905199. The next prime is 12428905273. The reversal of 12428905217 is 71250982421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12410851216 + 18054001 = 111404^2 + 4249^2 .

It is a cyclic number.

It is not a de Polignac number, because 12428905217 - 2¹⁰ = 12428904193 is a prime.

It is not a weakly prime, because it can be changed into another prime (12428905297) 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, 6214452608 + 6214452609.

It is an arithmetic number, because the mean of its divisors is an integer number (6214452609).

Almost surely, 2^12428905217 is an apocalyptic number.

It is an amenable number.

12428905217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12428905217 is an equidigital number, since it uses as much as digits as its factorization.

12428905217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 12428905217 in words is "twelve billion, four hundred twenty-eight million, nine hundred five thousand, two hundred seventeen".