13291009321 has 2 divisors, whose sum is σ = 13291009322. Its totient is φ = 13291009320.

The previous prime is 13291009313. The next prime is 13291009331. The reversal of 13291009321 is 12390019231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11575392921 + 1715616400 = 107589^2 + 41420^2 .

It is a cyclic number.

It is not a de Polignac number, because 13291009321 - 2³ = 13291009313 is a prime.

It is not a weakly prime, because it can be changed into another prime (13291009301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6645504660 + 6645504661.

It is an arithmetic number, because the mean of its divisors is an integer number (6645504661).

Almost surely, 2^13291009321 is an apocalyptic number.

It is an amenable number.

13291009321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13291009321 is an equidigital number, since it uses as much as digits as its factorization.

13291009321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 13291009321 in words is "thirteen billion, two hundred ninety-one million, nine thousand, three hundred twenty-one".