2201221091 has 2 divisors, whose sum is σ = 2201221092. Its totient is φ = 2201221090.

The previous prime is 2201221027. The next prime is 2201221093. The reversal of 2201221091 is 1901221022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2201221091 - 2⁶ = 2201221027 is a prime.

It is a Sophie Germain prime.

Together with 2201221093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2201221093) 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, 1100610545 + 1100610546.

It is an arithmetic number, because the mean of its divisors is an integer number (1100610546).

Almost surely, 2^2201221091 is an apocalyptic number.

2201221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201221091 is an equidigital number, since it uses as much as digits as its factorization.

2201221091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2201221091 is about 46917.1726663063. The cubic root of 2201221091 is about 1300.8320296958.

The spelling of 2201221091 in words is "two billion, two hundred one million, two hundred twenty-one thousand, ninety-one".