221002000171 has 2 divisors, whose sum is σ = 221002000172. Its totient is φ = 221002000170.

The previous prime is 221002000061. The next prime is 221002000201. The reversal of 221002000171 is 171000200122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221002000171 - 2²³ = 220993611563 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002009171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501000085 + 110501000086.

It is an arithmetic number, because the mean of its divisors is an integer number (110501000086).

Almost surely, 2^221002000171 is an apocalyptic number.

221002000171 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002000171 is an equidigital number, since it uses as much as digits as its factorization.

221002000171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

Adding to 221002000171 its reverse (171000200122), we get a palindrome (392002200293).

The spelling of 221002000171 in words is "two hundred twenty-one billion, two million, one hundred seventy-one", and thus it is an aban number.