11220817 has 2 divisors, whose sum is σ = 11220818. Its totient is φ = 11220816.

The previous prime is 11220809. The next prime is 11220821. The reversal of 11220817 is 71802211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10439361 + 781456 = 3231^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220817 - 2³ = 11220809 is a prime.

It is not a weakly prime, because it can be changed into another prime (11220857) 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, 5610408 + 5610409.

It is an arithmetic number, because the mean of its divisors is an integer number (5610409).

Almost surely, 2^11220817 is an apocalyptic number.

It is an amenable number.

11220817 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220817 is an equidigital number, since it uses as much as digits as its factorization.

11220817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 11220817 is about 3349.7487965518. The cubic root of 11220817 is about 223.8763201697.

It can be divided in two parts, 112208 and 17, that added together give a square (112225 = 335²).

The spelling of 11220817 in words is "eleven million, two hundred twenty thousand, eight hundred seventeen".