11111 is nontrivially palindromic in base 10.
11111 is digitally balanced in base 3, 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.
It is a cyclic number.
11111 is a strobogrammatic number because it is the same when read upside-down.
It is a deceptive number, since it divides R11110.
It is a Duffinian number.
11111 is a nontrivial repdigit in base 10.
It is a plaindrome in base 10 and base 15.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
211111 is an apocalyptic number.
11111 is an equidigital number, since it uses as much as digits as its factorization.
11111 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 312.
The square root of 11111 is about 105.4087282914. The cubic root of 11111 is about 22.3143572877.
The spelling of 11111 in words is "eleven thousand, one hundred eleven", and is thus an iban number.