Adding to 20021122200 its reverse (222112002), we get a palindrome (20243234202).
It is a congruent number.
It is an unprimeable number.
Almost surely, 220021122200 is an apocalyptic number.
20021122200 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 practical number, because each smaller number is the sum of distinct divisors of 20021122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31081749480).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20021122200 is a wasteful number, since it uses less digits than its factorization.
20021122200 is an evil number, because the sum of its binary digits is even.
The spelling of 20021122200 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand, two hundred".