221002221101171 has 2 divisors, whose sum is σ = 221002221101172. Its totient is φ = 221002221101170.

The previous prime is 221002221101089. The next prime is 221002221101177. The reversal of 221002221101171 is 171101122200122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002221101171 is a prime.

It is a super-4 number, since 4×221002221101171⁴ (a number of 58 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (221002221101177) 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, 110501110550585 + 110501110550586.

It is an arithmetic number, because the mean of its divisors is an integer number (110501110550586).

Almost surely, 2^{221002221101171} is an apocalyptic number.

221002221101171 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002221101171 is an equidigital number, since it uses as much as digits as its factorization.

221002221101171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 221002221101171 its reverse (171101122200122), we get a palindrome (392103343301293).

The spelling of 221002221101171 in words is "two hundred twenty-one trillion, two billion, two hundred twenty-one million, one hundred one thousand, one hundred seventy-one".