221113311187 has 2 divisors, whose sum is σ = 221113311188. Its totient is φ = 221113311186.

The previous prime is 221113311163. The next prime is 221113311193. The reversal of 221113311187 is 781113311122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221113311187 is a prime.

It is not a weakly prime, because it can be changed into another prime (221113311197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556655593 + 110556655594.

It is an arithmetic number, because the mean of its divisors is an integer number (110556655594).

Almost surely, 2^221113311187 is an apocalyptic number.

221113311187 is a deficient number, since it is larger than the sum of its proper divisors (1).

221113311187 is an equidigital number, since it uses as much as digits as its factorization.

221113311187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The spelling of 221113311187 in words is "two hundred twenty-one billion, one hundred thirteen million, three hundred eleven thousand, one hundred eighty-seven".