1111 is nontrivially palindromic in base 10, base 12, base 13 and base 14.
1111 is an esthetic number in base 12 and base 13, because in such bases it adjacent digits differ by 1.
It is a semiprime because it is the product of two primes.
It is a 3-Lehmer number, since φ(1111) divides (1111-1)3.
It is a cyclic number.
1111 is a strobogrammatic number because it is the same when read upside-down.
It is a Duffinian number.
1111 is an undulating number in base 12, base 13 and base 14.
1111 is a nontrivial repdigit in base 10.
It is a plaindrome in base 10 and base 16.
It is a nialpdrome in base 10 and base 11.
It is a zygodrome in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 1111.
It is a congruent number.
1111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
1111 is a wasteful number, since it uses less digits than its factorization.
1111 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 112.
The square root of 1111 is about 33.3316666250. The cubic root of 1111 is about 10.3570964269.
The spelling of 1111 in words is "one thousand, one hundred eleven", and is thus an iban number.