11220247 has 2 divisors, whose sum is σ = 11220248. Its totient is φ = 11220246.

The previous prime is 11220227. The next prime is 11220269. The reversal of 11220247 is 74202211.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (74202211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11220247 - 2¹⁹ = 10695959 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220227) 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, 5610123 + 5610124.

It is an arithmetic number, because the mean of its divisors is an integer number (5610124).

Almost surely, 2^11220247 is an apocalyptic number.

11220247 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220247 is an equidigital number, since it uses as much as digits as its factorization.

11220247 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 19.

The square root of 11220247 is about 3349.6637144645. The cubic root of 11220247 is about 223.8725292496.

Adding to 11220247 its reverse (74202211), we get a palindrome (85422458).

The spelling of 11220247 in words is "eleven million, two hundred twenty thousand, two hundred forty-seven".