Adding to 21210200010001 its reverse (10001000201212), we get a palindrome (31211200211213).
It is a cyclic number.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 21210200010001.
Almost surely, 221210200010001 is an apocalyptic number.
It is an amenable number.
21210200010001 is a wasteful number, since it uses less digits than its factorization.
21210200010001 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 105720.
The spelling of 21210200010001 in words is "twenty-one trillion, two hundred ten billion, two hundred million, ten thousand, one".