Adding to 11022221 its reverse (12222011), we get a palindrome (23244232).
It is a happy number.
11022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a cyclic number.
It is a Curzon number.
It is a congruent number.
Almost surely, 211022221 is an apocalyptic number.
It is an amenable number.
11022221 is a wasteful number, since it uses less digits than its factorization.
11022221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 560.
The square root of 11022221 is about 3319.9730420592. The cubic root of 11022221 is about 222.5476630627.
The spelling of 11022221 in words is "eleven million, twenty-two thousand, two hundred twenty-one".