13121298317 has 2 divisors, whose sum is σ = 13121298318. Its totient is φ = 13121298316.

The previous prime is 13121298301. The next prime is 13121298319. The reversal of 13121298317 is 71389212131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9027090121 + 4094208196 = 95011^2 + 63986^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121298317 - 2⁴ = 13121298301 is a prime.

Together with 13121298319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13121298319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560649158 + 6560649159.

It is an arithmetic number, because the mean of its divisors is an integer number (6560649159).

Almost surely, 2^13121298317 is an apocalyptic number.

It is an amenable number.

13121298317 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121298317 is an equidigital number, since it uses as much as digits as its factorization.

13121298317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The spelling of 13121298317 in words is "thirteen billion, one hundred twenty-one million, two hundred ninety-eight thousand, three hundred seventeen".