11221224 has 64 divisors (see below), whose sum is σ = 33955200. Its totient is φ = 3016704.

The previous prime is 11221219. The next prime is 11221247. The reversal of 11221224 is 42212211.

11221224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 892 + ... + 4820.

It is an arithmetic number, because the mean of its divisors is an integer number (530550).

Almost surely, 2^11221224 is an apocalyptic number.

11221224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11221224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16977600).

11221224 is an abundant number, since it is smaller than the sum of its proper divisors (22733976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221224 is a wasteful number, since it uses less digits than its factorization.

11221224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962 (or 3958 counting only the distinct ones).

The product of its digits is 64, while the sum is 15.

The square root of 11221224 is about 3349.8095468250. The cubic root of 11221224 is about 223.8790269412.

Adding to 11221224 its reverse (42212211), we get a palindrome (53433435).

It can be divided in two parts, 1122 and 1224, that added together give a triangular number (2346 = T₆₈).

The spelling of 11221224 in words is "eleven million, two hundred twenty-one thousand, two hundred twenty-four".