22220220091 has 2 divisors, whose sum is σ = 22220220092. Its totient is φ = 22220220090.

The previous prime is 22220220059. The next prime is 22220220193. The reversal of 22220220091 is 19002202222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22220220091 - 2⁵ = 22220220059 is a prime.

It is not a weakly prime, because it can be changed into another prime (22220200091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110110045 + 11110110046.

It is an arithmetic number, because the mean of its divisors is an integer number (11110110046).

Almost surely, 2^22220220091 is an apocalyptic number.

22220220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220220091 is an equidigital number, since it uses as much as digits as its factorization.

22220220091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 22220220091 in words is "twenty-two billion, two hundred twenty million, two hundred twenty thousand, ninety-one".