Adding to 11121 its reverse (12111), we get a palindrome (23232).
Subtracting 11121 from its reverse (12111), we obtain a triangular number (990 = T44).
Multipling 11121 by its reverse (12111), we get a palindrome (134686431).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a plaindrome in base 15.
211121 is an apocalyptic number.
11121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
11121 is a wasteful number, since it uses less digits than its factorization.
11121 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 351.
The square root of 11121 is about 105.4561520254. The cubic root of 11121 is about 22.3210496545.
The spelling of 11121 in words is "eleven thousand, one hundred twenty-one", and thus it is an iban number.