Adding to 11221141 its reverse (14112211), we get a palindrome (25333352).
11221141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-11221141 is a prime.
It is a congruent number.
Almost surely, 211221141 is an apocalyptic number.
It is an amenable number.
11221141 is an equidigital number, since it uses as much as digits as its factorization.
11221141 is an evil number, because the sum of its binary digits is even.
The square root of 11221141 is about 3349.7971580381. The cubic root of 11221141 is about 223.8784749513.
The spelling of 11221141 in words is "eleven million, two hundred twenty-one thousand, one hundred forty-one".