11221047 has 12 divisors (see below), whose sum is σ = 16280784. Its totient is φ = 7447200.

The previous prime is 11221043. The next prime is 11221051. The reversal of 11221047 is 74012211.

It is an interprime number because it is at equal distance from previous prime (11221043) and next prime (11221051).

It is not a de Polignac number, because 11221047 - 2² = 11221043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221043) 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 in 11 ways as a sum of consecutive naturals, for example, 579 + ... + 4772.

It is an arithmetic number, because the mean of its divisors is an integer number (1356732).

Almost surely, 2^11221047 is an apocalyptic number.

11221047 is a deficient number, since it is larger than the sum of its proper divisors (5059737).

11221047 is a wasteful number, since it uses less digits than its factorization.

11221047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590 (or 5587 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 11221047 is about 3349.7831273084. The cubic root of 11221047 is about 223.8778498029.

Adding to 11221047 its reverse (74012211), we get a palindrome (85233258).

The spelling of 11221047 in words is "eleven million, two hundred twenty-one thousand, forty-seven".