11072221 has 2 divisors, whose sum is σ = 11072222. Its totient is φ = 11072220.

The previous prime is 11072209. The next prime is 11072227. The reversal of 11072221 is 12227011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 902500 = 3189^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 11072221 - 2⁵ = 11072189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11072195 and 11072204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11072227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5536110 + 5536111.

It is an arithmetic number, because the mean of its divisors is an integer number (5536111).

Almost surely, 2^11072221 is an apocalyptic number.

It is an amenable number.

11072221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11072221 is an equidigital number, since it uses as much as digits as its factorization.

11072221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 11072221 is about 3327.4947032264. The cubic root of 11072221 is about 222.8836691406.

Adding to 11072221 its reverse (12227011), we get a palindrome (23299232).

The spelling of 11072221 in words is "eleven million, seventy-two thousand, two hundred twenty-one".