Adding to 21022201122 its reverse (22110222012), we get a palindrome (43132423134).
It is an unprimeable number.
Almost surely, 221022201122 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21022201122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25323217920).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21022201122 is a wasteful number, since it uses less digits than its factorization.
21022201122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3048.
The spelling of 21022201122 in words is "twenty-one billion, twenty-two million, two hundred one thousand, one hundred twenty-two".