Adding to 11021 its reverse (12011), we get a palindrome (23032).
Subtracting 11021 from its reverse (12011), we obtain a triangular number (990 = T44).
Multipling 11021 by its reverse (12011), we get a palindrome (132373231).
It is a happy number.
11021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
211021 is an apocalyptic number.
It is an amenable number.
11021 is a wasteful number, since it uses less digits than its factorization.
11021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 210.
The square root of 11021 is about 104.9809506530. The cubic root of 11021 is about 22.2539445096.
The spelling of 11021 in words is "eleven thousand, twenty-one", and thus it is an iban number.