221002201111171 has 2 divisors, whose sum is σ = 221002201111172. Its totient is φ = 221002201111170.

The previous prime is 221002201111049. The next prime is 221002201111187. The reversal of 221002201111171 is 171111102200122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221002201111171 - 2¹⁹ = 221002200586883 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002201511171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501100555585 + 110501100555586.

It is an arithmetic number, because the mean of its divisors is an integer number (110501100555586).

Almost surely, 2^{221002201111171} is an apocalyptic number.

221002201111171 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002201111171 is an equidigital number, since it uses as much as digits as its factorization.

221002201111171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 221002201111171 its reverse (171111102200122), we get a palindrome (392113303311293).

The spelling of 221002201111171 in words is "two hundred twenty-one trillion, two billion, two hundred one million, one hundred eleven thousand, one hundred seventy-one".