It is a congruent number.
It is an unprimeable number.
21221104 is an apocalyptic number.
It is an amenable number.
1221104 is a wasteful number, since it uses less digits than its factorization.
1221104 is an odious number, because the sum of its binary digits is odd.
The square root of 1221104 is about 1105.0357460282. The cubic root of 1221104 is about 106.8851943583.
Adding to 1221104 its reverse (4011221), we get a palindrome (5232325).
The spelling of 1221104 in words is "one million, two hundred twenty-one thousand, one hundred four".