13221001187 has 2 divisors, whose sum is σ = 13221001188. Its totient is φ = 13221001186.

The previous prime is 13221001181. The next prime is 13221001229. The reversal of 13221001187 is 78110012231.

It is a weak prime.

It is an emirp because it is prime and its reverse (78110012231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13221001187 - 2¹² = 13220997091 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221001181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610500593 + 6610500594.

It is an arithmetic number, because the mean of its divisors is an integer number (6610500594).

Almost surely, 2^13221001187 is an apocalyptic number.

13221001187 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221001187 is an equidigital number, since it uses as much as digits as its factorization.

13221001187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The spelling of 13221001187 in words is "thirteen billion, two hundred twenty-one million, one thousand, one hundred eighty-seven".