11221240 has 32 divisors (see below), whose sum is σ = 26347680. Its totient is φ = 4292992.

The previous prime is 11221219. The next prime is 11221247. The reversal of 11221240 is 4212211.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11221240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221247) 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 7 ways as a sum of consecutive naturals, for example, 5179 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (823365).

Almost surely, 2^11221240 is an apocalyptic number.

11221240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221240 is an abundant number, since it is smaller than the sum of its proper divisors (15126440).

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

11221240 is a wasteful number, since it uses less digits than its factorization.

11221240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12231 (or 12227 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 11221240 is about 3349.8119350196. The cubic root of 11221240 is about 223.8791333485.

Adding to 11221240 its reverse (4212211), we get a palindrome (15433451).

The spelling of 11221240 in words is "eleven million, two hundred twenty-one thousand, two hundred forty".