Adding to 11101111101111 its reverse (11110111110111), we get a palindrome (22211222211222).
11101111101111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a Duffinian number.
It is a congruent number.
Almost surely, 211101111101111 is an apocalyptic number.
11101111101111 is a wasteful number, since it uses less digits than its factorization.
11101111101111 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 20444035361.
The spelling of 11101111101111 in words is "eleven trillion, one hundred one billion, one hundred eleven million, one hundred one thousand, one hundred eleven".