Adding to 1001222000 its reverse (2221001), we get a palindrome (1003443001).
Subtracting from 1001222000 its reverse (2221001), we obtain a palindrome (999000999).
It is a tau number, because it is divible by the number of its divisors (80).
It is a congruent number.
It is an unprimeable number.
Almost surely, 21001222000 is an apocalyptic number.
1001222000 is a gapful number since it is divisible by the number (10) 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 1001222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217279232).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1001222000 is a wasteful number, since it uses less digits than its factorization.
1001222000 is an odious number, because the sum of its binary digits is odd.
The square root of 1001222000 is about 31642.0922190679. The cubic root of 1001222000 is about 1000.4071675254.
The spelling of 1001222000 in words is "one billion, one million, two hundred twenty-two thousand".