Adding to 21210200010000 its reverse (1000201212), we get a palindrome (21211200211212).
21210200010000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (150).
It is an unprimeable number.
Almost surely, 221210200010000 is an apocalyptic number.
21210200010000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21210200010000 is a wasteful number, since it uses less digits than its factorization.
21210200010000 is an evil number, because the sum of its binary digits is even.
The spelling of 21210200010000 in words is "twenty-one trillion, two hundred ten billion, two hundred million, ten thousand".