13321313209 has 2 divisors, whose sum is σ = 13321313210. Its totient is φ = 13321313208.

The previous prime is 13321313207. The next prime is 13321313233. The reversal of 13321313209 is 90231312331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10840974400 + 2480338809 = 104120^2 + 49803^2 .

It is a cyclic number.

It is not a de Polignac number, because 13321313209 - 2¹ = 13321313207 is a prime.

It is a super-2 number, since 2×13321313209² (a number of 21 digits) contains 22 as substring.

Together with 13321313207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13321313207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660656604 + 6660656605.

It is an arithmetic number, because the mean of its divisors is an integer number (6660656605).

Almost surely, 2^13321313209 is an apocalyptic number.

It is an amenable number.

13321313209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321313209 is an equidigital number, since it uses as much as digits as its factorization.

13321313209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 13321313209 in words is "thirteen billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred nine".