It is a congruent number.
It is an unprimeable number.
Almost surely, 222111120200020 is an apocalyptic number.
22111120200020 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.
22111120200020 is a wasteful number, since it uses less digits than its factorization.
22111120200020 is an odious number, because the sum of its binary digits is odd.
Adding to 22111120200020 its reverse (2000202111122), we get a palindrome (24111322311142).
The spelling of 22111120200020 in words is "twenty-two trillion, one hundred eleven billion, one hundred twenty million, two hundred thousand, twenty".