12601715209 has 2 divisors, whose sum is σ = 12601715210. Its totient is φ = 12601715208.

The previous prime is 12601715177. The next prime is 12601715219. The reversal of 12601715209 is 90251710621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7195789584 + 5405925625 = 84828^2 + 73525^2 .

It is an emirp because it is prime and its reverse (90251710621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12601715209 - 2⁵ = 12601715177 is a prime.

It is not a weakly prime, because it can be changed into another prime (12601715219) 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, 6300857604 + 6300857605.

It is an arithmetic number, because the mean of its divisors is an integer number (6300857605).

Almost surely, 2^12601715209 is an apocalyptic number.

It is an amenable number.

12601715209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12601715209 is an equidigital number, since it uses as much as digits as its factorization.

12601715209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 12601715209 in words is "twelve billion, six hundred one million, seven hundred fifteen thousand, two hundred nine".