12222222091 has 2 divisors, whose sum is σ = 12222222092. Its totient is φ = 12222222090.

The previous prime is 12222222073. The next prime is 12222222101. The reversal of 12222222091 is 19022222221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12222222091 - 2⁵ = 12222222059 is a prime.

It is not a weakly prime, because it can be changed into another prime (12222222031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111111045 + 6111111046.

It is an arithmetic number, because the mean of its divisors is an integer number (6111111046).

Almost surely, 2^12222222091 is an apocalyptic number.

12222222091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222222091 is an equidigital number, since it uses as much as digits as its factorization.

12222222091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 12222222091 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, ninety-one".