202020441991 has 2 divisors, whose sum is σ = 202020441992. Its totient is φ = 202020441990.

The previous prime is 202020441967. The next prime is 202020442073. The reversal of 202020441991 is 199144020202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202020441991 - 2²¹ = 202018344839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202020441911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101010220995 + 101010220996.

It is an arithmetic number, because the mean of its divisors is an integer number (101010220996).

Almost surely, 2^202020441991 is an apocalyptic number.

202020441991 is a deficient number, since it is larger than the sum of its proper divisors (1).

202020441991 is an equidigital number, since it uses as much as digits as its factorization.

202020441991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 202020441991 in words is "two hundred two billion, twenty million, four hundred forty-one thousand, nine hundred ninety-one".