22221021191 has 2 divisors, whose sum is σ = 22221021192. Its totient is φ = 22221021190.

The previous prime is 22221021167. The next prime is 22221021233. The reversal of 22221021191 is 19112012222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22221021191 - 2¹⁸ = 22220759047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221021491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110510595 + 11110510596.

It is an arithmetic number, because the mean of its divisors is an integer number (11110510596).

Almost surely, 2^22221021191 is an apocalyptic number.

22221021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221021191 is an equidigital number, since it uses as much as digits as its factorization.

22221021191 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 23.

The spelling of 22221021191 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, one hundred ninety-one".