22111210091 has 2 divisors, whose sum is σ = 22111210092. Its totient is φ = 22111210090.

The previous prime is 22111210063. The next prime is 22111210153. The reversal of 22111210091 is 19001211122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22111210091 - 2³⁰ = 21037468267 is a prime.

It is a super-2 number, since 2×22111210091² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22111200091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055605045 + 11055605046.

It is an arithmetic number, because the mean of its divisors is an integer number (11055605046).

Almost surely, 2^22111210091 is an apocalyptic number.

22111210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111210091 is an equidigital number, since it uses as much as digits as its factorization.

22111210091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 22111210091 in words is "twenty-two billion, one hundred eleven million, two hundred ten thousand, ninety-one".