13221646507 has 2 divisors, whose sum is σ = 13221646508. Its totient is φ = 13221646506.

The previous prime is 13221646457. The next prime is 13221646549. The reversal of 13221646507 is 70564612231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13221646507 - 2³¹ = 11074162859 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221646597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610823253 + 6610823254.

It is an arithmetic number, because the mean of its divisors is an integer number (6610823254).

Almost surely, 2^13221646507 is an apocalyptic number.

13221646507 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221646507 is an equidigital number, since it uses as much as digits as its factorization.

13221646507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 13221646507 in words is "thirteen billion, two hundred twenty-one million, six hundred forty-six thousand, five hundred seven".