It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-11101111101011 is a prime.
It is a Duffinian number.
Almost surely, 211101111101011 is an apocalyptic number.
11101111101011 is an equidigital number, since it uses as much as digits as its factorization.
11101111101011 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 236193853260.
Adding to 11101111101011 its reverse (11010111110111), we get a palindrome (22111222211122).
The spelling of 11101111101011 in words is "eleven trillion, one hundred one billion, one hundred eleven million, one hundred one thousand, eleven".