It is a self number, because there is not a number n which added to its sum of digits gives 222123021020.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2222123021020 is an apocalyptic number.
222123021020 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.
222123021020 is a wasteful number, since it uses less digits than its factorization.
222123021020 is an evil number, because the sum of its binary digits is even.
Adding to 222123021020 its reverse (20120321222), we get a palindrome (242243342242).
The spelling of 222123021020 in words is "two hundred twenty-two billion, one hundred twenty-three million, twenty-one thousand, twenty".