11220917 has 2 divisors, whose sum is σ = 11220918. Its totient is φ = 11220916.

The previous prime is 11220899. The next prime is 11220931. The reversal of 11220917 is 71902211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5958481 + 5262436 = 2441^2 + 2294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220917 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220892 and 11220901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610458 + 5610459.

It is an arithmetic number, because the mean of its divisors is an integer number (5610459).

Almost surely, 2^11220917 is an apocalyptic number.

It is an amenable number.

11220917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220917 is an equidigital number, since it uses as much as digits as its factorization.

11220917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 11220917 is about 3349.7637230109. The cubic root of 11220917 is about 223.8769852302.

The spelling of 11220917 in words is "eleven million, two hundred twenty thousand, nine hundred seventeen".