201002221100171 has 2 divisors, whose sum is σ = 201002221100172. Its totient is φ = 201002221100170.

The previous prime is 201002221100129. The next prime is 201002221100269. The reversal of 201002221100171 is 171001122200102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201002221100171 is a prime.

It is not a weakly prime, because it can be changed into another prime (201002221103171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100501110550085 + 100501110550086.

It is an arithmetic number, because the mean of its divisors is an integer number (100501110550086).

Almost surely, 2^{201002221100171} is an apocalyptic number.

201002221100171 is a deficient number, since it is larger than the sum of its proper divisors (1).

201002221100171 is an equidigital number, since it uses as much as digits as its factorization.

201002221100171 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 20.

Adding to 201002221100171 its reverse (171001122200102), we get a palindrome (372003343300273).

The spelling of 201002221100171 in words is "two hundred one trillion, two billion, two hundred twenty-one million, one hundred thousand, one hundred seventy-one".