202201211212171 has 2 divisors, whose sum is σ = 202201211212172. Its totient is φ = 202201211212170.

The previous prime is 202201211212157. The next prime is 202201211212183. The reversal of 202201211212171 is 171212112102202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202201211212171 - 2³¹ = 202199063728523 is a prime.

It is not a weakly prime, because it can be changed into another prime (202201217212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101100605606085 + 101100605606086.

It is an arithmetic number, because the mean of its divisors is an integer number (101100605606086).

Almost surely, 2^{202201211212171} is an apocalyptic number.

202201211212171 is a deficient number, since it is larger than the sum of its proper divisors (1).

202201211212171 is an equidigital number, since it uses as much as digits as its factorization.

202201211212171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 202201211212171 its reverse (171212112102202), we get a palindrome (373413323314373).

The spelling of 202201211212171 in words is "two hundred two trillion, two hundred one billion, two hundred eleven million, two hundred twelve thousand, one hundred seventy-one".