202221121220191 has 2 divisors, whose sum is σ = 202221121220192. Its totient is φ = 202221121220190.

The previous prime is 202221121220159. The next prime is 202221121220299. The reversal of 202221121220191 is 191022121122202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202221121220191 - 2⁵ = 202221121220159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202221121220491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110560610095 + 101110560610096.

It is an arithmetic number, because the mean of its divisors is an integer number (101110560610096).

Almost surely, 2^{202221121220191} is an apocalyptic number.

202221121220191 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221121220191 is an equidigital number, since it uses as much as digits as its factorization.

202221121220191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 202221121220191 its reverse (191022121122202), we get a palindrome (393243242342393).

The spelling of 202221121220191 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred ninety-one".