11211247 has 2 divisors, whose sum is σ = 11211248. Its totient is φ = 11211246.

The previous prime is 11211229. The next prime is 11211271. The reversal of 11211247 is 74211211.

11211247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (74211211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211247 - 2¹¹ = 11209199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605623 + 5605624.

It is an arithmetic number, because the mean of its divisors is an integer number (5605624).

Almost surely, 2^11211247 is an apocalyptic number.

11211247 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211247 is an equidigital number, since it uses as much as digits as its factorization.

11211247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112, while the sum is 19.

The square root of 11211247 is about 3348.3200265208. The cubic root of 11211247 is about 223.8126555908.

Adding to 11211247 its reverse (74211211), we get a palindrome (85422458).

The spelling of 11211247 in words is "eleven million, two hundred eleven thousand, two hundred forty-seven".