11226221 has 2 divisors, whose sum is σ = 11226222. Its totient is φ = 11226220.

The previous prime is 11226199. The next prime is 11226223. The reversal of 11226221 is 12262211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11222500 + 3721 = 3350^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 11226221 - 2⁶ = 11226157 is a prime.

Together with 11226223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11226221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11226223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5613110 + 5613111.

It is an arithmetic number, because the mean of its divisors is an integer number (5613111).

Almost surely, 2^11226221 is an apocalyptic number.

It is an amenable number.

11226221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11226221 is an equidigital number, since it uses as much as digits as its factorization.

11226221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 11226221 is about 3350.5553271062. Note that the first 3 decimals coincide. The cubic root of 11226221 is about 223.9122543763.

Adding to 11226221 its reverse (12262211), we get a palindrome (23488432).

The spelling of 11226221 in words is "eleven million, two hundred twenty-six thousand, two hundred twenty-one".