11198221 has 2 divisors, whose sum is σ = 11198222. Its totient is φ = 11198220.

The previous prime is 11198203. The next prime is 11198227. The reversal of 11198221 is 12289111.

11198221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10176100 + 1022121 = 3190^2 + 1011^2 .

It is an emirp because it is prime and its reverse (12289111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11198221 - 2⁷ = 11198093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11198227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599110 + 5599111.

It is an arithmetic number, because the mean of its divisors is an integer number (5599111).

Almost surely, 2^11198221 is an apocalyptic number.

It is an amenable number.

11198221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11198221 is an equidigital number, since it uses as much as digits as its factorization.

11198221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 25.

The square root of 11198221 is about 3346.3743066190. The cubic root of 11198221 is about 223.7259416722.

The spelling of 11198221 in words is "eleven million, one hundred ninety-eight thousand, two hundred twenty-one".