20220042191 has 2 divisors, whose sum is σ = 20220042192. Its totient is φ = 20220042190.

The previous prime is 20220042151. The next prime is 20220042229. The reversal of 20220042191 is 19124002202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220042191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220042121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110021095 + 10110021096.

It is an arithmetic number, because the mean of its divisors is an integer number (10110021096).

Almost surely, 2^20220042191 is an apocalyptic number.

20220042191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220042191 is an equidigital number, since it uses as much as digits as its factorization.

20220042191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20220042191 its reverse (19124002202), we get a palindrome (39344044393).

The spelling of 20220042191 in words is "twenty billion, two hundred twenty million, forty-two thousand, one hundred ninety-one".