11221001222209 has 2 divisors, whose sum is σ = 11221001222210. Its totient is φ = 11221001222208.

The previous prime is 11221001222159. The next prime is 11221001222237. The reversal of 11221001222209 is 90222210012211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11184529771584 + 36471450625 = 3344328^2 + 190975^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221001222209 - 2¹¹ = 11221001220161 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221001222239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610500611104 + 5610500611105.

It is an arithmetic number, because the mean of its divisors is an integer number (5610500611105).

Almost surely, 2^{11221001222209} is an apocalyptic number.

It is an amenable number.

11221001222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221001222209 is an equidigital number, since it uses as much as digits as its factorization.

11221001222209 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 25.

The spelling of 11221001222209 in words is "eleven trillion, two hundred twenty-one billion, one million, two hundred twenty-two thousand, two hundred nine".