Adding to 21210200011001 its reverse (10011000201212), we get a palindrome (31221200212213).
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-21210200011001 is a prime.
It is a Duffinian number.
Almost surely, 221210200011001 is an apocalyptic number.
It is an amenable number.
21210200011001 is a wasteful number, since it uses less digits than its factorization.
21210200011001 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 19229556870.
The spelling of 21210200011001 in words is "twenty-one trillion, two hundred ten billion, two hundred million, eleven thousand, one".