11221222 has 4 divisors (see below), whose sum is σ = 16831836. Its totient is φ = 5610610.

The previous prime is 11221219. The next prime is 11221247. The reversal of 11221222 is 22212211.

It is a happy number.

It is a semiprime because it is the product of two primes.

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

It is a congruent number.

It is an unprimeable number.

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, 2805304 + ... + 2805307.

It is an arithmetic number, because the mean of its divisors is an integer number (4207959).

Almost surely, 2^11221222 is an apocalyptic number.

11221222 is a deficient number, since it is larger than the sum of its proper divisors (5610614).

11221222 is an equidigital number, since it uses as much as digits as its factorization.

11221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610613.

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

The square root of 11221222 is about 3349.8092483006. The cubic root of 11221222 is about 223.8790136402.

Adding to 11221222 its reverse (22212211), we get a palindrome (33433433).

The spelling of 11221222 in words is "eleven million, two hundred twenty-one thousand, two hundred twenty-two".