Adding to 22012212200021 its reverse (12000221221022), we get a palindrome (34012433421043).
It is a happy number.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
Almost surely, 222012212200021 is an apocalyptic number.
It is an amenable number.
22012212200021 is an equidigital number, since it uses as much as digits as its factorization.
22012212200021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 710071361322.
The spelling of 22012212200021 in words is "twenty-two trillion, twelve billion, two hundred twelve million, two hundred thousand, twenty-one".