13011220309 has 2 divisors, whose sum is σ = 13011220310. Its totient is φ = 13011220308.

The previous prime is 13011220297. The next prime is 13011220361. The reversal of 13011220309 is 90302211031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7838446225 + 5172774084 = 88535^2 + 71922^2 .

It is a cyclic number.

It is not a de Polignac number, because 13011220309 - 2²⁹ = 12474349397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13011220309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13011220379) 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, 6505610154 + 6505610155.

It is an arithmetic number, because the mean of its divisors is an integer number (6505610155).

Almost surely, 2^13011220309 is an apocalyptic number.

It is an amenable number.

13011220309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13011220309 is an equidigital number, since it uses as much as digits as its factorization.

13011220309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 13011220309 in words is "thirteen billion, eleven million, two hundred twenty thousand, three hundred nine".