It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
Almost surely, 211554656513311 is an apocalyptic number.
11554656513311 is an equidigital number, since it uses as much as digits as its factorization.
11554656513311 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13971774120.
The spelling of 11554656513311 in words is "eleven trillion, five hundred fifty-four billion, six hundred fifty-six million, five hundred thirteen thousand, three hundred eleven".