202131020171 has 2 divisors, whose sum is σ = 202131020172. Its totient is φ = 202131020170.

The previous prime is 202131020123. The next prime is 202131020177. The reversal of 202131020171 is 171020131202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202131020171 - 2⁶ = 202131020107 is a prime.

It is not a weakly prime, because it can be changed into another prime (202131020177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065510085 + 101065510086.

It is an arithmetic number, because the mean of its divisors is an integer number (101065510086).

Almost surely, 2^202131020171 is an apocalyptic number.

202131020171 is a deficient number, since it is larger than the sum of its proper divisors (1).

202131020171 is an equidigital number, since it uses as much as digits as its factorization.

202131020171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 202131020171 its reverse (171020131202), we get a palindrome (373151151373).

The spelling of 202131020171 in words is "two hundred two billion, one hundred thirty-one million, twenty thousand, one hundred seventy-one".