It is a happy number.
It is a nude number because it is divisible by every one of its digits.
It is a plaindrome in base 10 and base 15.
It is a nialpdrome in base 12.
It is a congruent number.
It is an unprimeable number.
211124 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 11124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
11124 is a wasteful number, since it uses less digits than its factorization.
11124 is an evil number, because the sum of its binary digits is even.
The square root of 11124 is about 105.4703749875. The cubic root of 11124 is about 22.3230565822.
Adding to 11124 its reverse (42111), we get a palindrome (53235).
The spelling of 11124 in words is "eleven thousand, one hundred twenty-four", and thus it is an iban number.