Adding to 1211200 its reverse (21121), we get a palindrome (1232321).
It is a congruent number.
21211200 is an apocalyptic number.
1211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492123).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1211200 is an equidigital number, since it uses as much as digits as its factorization.
1211200 is an odious number, because the sum of its binary digits is odd.
The square root of 1211200 is about 1100.5453193758. The cubic root of 1211200 is about 106.5954385582.
The spelling of 1211200 in words is "one million, two hundred eleven thousand, two hundred".