It is a sphenic number, since it is the product of 3 distinct primes.
It is a plaindrome in base 13.
It is a nialpdrome in base 11.
It is a self number, because there is not a number n which added to its sum of digits gives 12111.
It is a congruent number.
212111 is an apocalyptic number.
12111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
12111 is a wasteful number, since it uses less digits than its factorization.
12111 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 381.
The square root of 12111 is about 110.0499886415. The cubic root of 12111 is about 22.9646590196.
Adding to 12111 its reverse (11121), we get a palindrome (23232).
Subtracting from 12111 its reverse (11121), we obtain a triangular number (990 = T44).
Multiplying 12111 by its reverse (11121), we get a palindrome (134686431).
The spelling of 12111 in words is "twelve thousand, one hundred eleven", and thus it is an iban number.