11211217 has 2 divisors, whose sum is σ = 11211218. Its totient is φ = 11211216.

The previous prime is 11211209. The next prime is 11211229. The reversal of 11211217 is 71211211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5716881 + 5494336 = 2391^2 + 2344^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211217 - 2³ = 11211209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11211217.

It is not a weakly prime, because it can be changed into another prime (11211247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605608 + 5605609.

It is an arithmetic number, because the mean of its divisors is an integer number (5605609).

Almost surely, 2^11211217 is an apocalyptic number.

It is an amenable number.

11211217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211217 is an equidigital number, since it uses as much as digits as its factorization.

11211217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28, while the sum is 16.

The square root of 11211217 is about 3348.3155466592. The cubic root of 11211217 is about 223.8124559583.

Adding to 11211217 its reverse (71211211), we get a palindrome (82422428).

The spelling of 11211217 in words is "eleven million, two hundred eleven thousand, two hundred seventeen".