It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
21121222 is an apocalyptic number.
1121222 is an equidigital number, since it uses as much as digits as its factorization.
1121222 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6390.
The square root of 1121222 is about 1058.8777077642. The cubic root of 1121222 is about 103.8876375221.
Subtracting from 1121222 its sum of digits (11), we obtain a palindrome (1121211).
Adding to 1121222 its reverse (2221211), we get a palindrome (3342433).
The spelling of 1121222 in words is "one million, one hundred twenty-one thousand, two hundred twenty-two".