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 an unprimeable number.
21221122 is an apocalyptic number.
1221122 is an equidigital number, since it uses as much as digits as its factorization.
1221122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 87232.
The square root of 1221122 is about 1105.0438905311. The cubic root of 1221122 is about 106.8857195454.
Adding to 1221122 its reverse (2211221), we get a palindrome (3432343).
Subtracting 1221122 from its reverse (2211221), we obtain a palindrome (990099).
The spelling of 1221122 in words is "one million, two hundred twenty-one thousand, one hundred twenty-two".