13211407309 has 2 divisors, whose sum is σ = 13211407310. Its totient is φ = 13211407308.

The previous prime is 13211407277. The next prime is 13211407337. The reversal of 13211407309 is 90370411231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13145310409 + 66096900 = 114653^2 + 8130^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211407309 - 2⁵ = 13211407277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13211407369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605703654 + 6605703655.

It is an arithmetic number, because the mean of its divisors is an integer number (6605703655).

Almost surely, 2^13211407309 is an apocalyptic number.

It is an amenable number.

13211407309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211407309 is an equidigital number, since it uses as much as digits as its factorization.

13211407309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 13211407309 in words is "thirteen billion, two hundred eleven million, four hundred seven thousand, three hundred nine".