Adding to 11331131121321 its reverse (12312113113311), we get a palindrome (23643244234632).
11331131121321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
Almost surely, 211331131121321 is an apocalyptic number.
11331131121321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
11331131121321 is a wasteful number, since it uses less digits than its factorization.
11331131121321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 90829.
The spelling of 11331131121321 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, one hundred twenty-one thousand, three hundred twenty-one".