13221871087 has 2 divisors, whose sum is σ = 13221871088. Its totient is φ = 13221871086.

The previous prime is 13221871043. The next prime is 13221871093. The reversal of 13221871087 is 78017812231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13221871087 - 2¹¹ = 13221869039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221871097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610935543 + 6610935544.

It is an arithmetic number, because the mean of its divisors is an integer number (6610935544).

Almost surely, 2^13221871087 is an apocalyptic number.

13221871087 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221871087 is an equidigital number, since it uses as much as digits as its factorization.

13221871087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 40.

The spelling of 13221871087 in words is "thirteen billion, two hundred twenty-one million, eight hundred seventy-one thousand, eighty-seven".