22221020191 has 2 divisors, whose sum is σ = 22221020192. Its totient is φ = 22221020190.

The previous prime is 22221020149. The next prime is 22221020203. The reversal of 22221020191 is 19102012222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22221020191 - 2⁹ = 22221019679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221020491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110510095 + 11110510096.

It is an arithmetic number, because the mean of its divisors is an integer number (11110510096).

Almost surely, 2^22221020191 is an apocalyptic number.

22221020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221020191 is an equidigital number, since it uses as much as digits as its factorization.

22221020191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 22221020191 in words is "twenty-two billion, two hundred twenty-one million, twenty thousand, one hundred ninety-one".