It is a self number, because there is not a number n which added to its sum of digits gives 212221200111020.
Almost surely, 2212221200111020 is an apocalyptic number.
212221200111020 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.
212221200111020 is a wasteful number, since it uses less digits than its factorization.
212221200111020 is an evil number, because the sum of its binary digits is even.
Adding to 212221200111020 its reverse (20111002122212), we get a palindrome (232332202233232).
The spelling of 212221200111020 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred million, one hundred eleven thousand, twenty".