Adding to 122221000000 its reverse (122221), we get a palindrome (122221122221).
122221000000 divided by its reverse (122221) gives a 6-th power (1000000 = 106).
It is a congruent number.
Almost surely, 2122221000000 is an apocalyptic number.
122221000000 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 122221000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170019073728).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
122221000000 is an frugal number, since it uses more digits than its factorization.
122221000000 is an odious number, because the sum of its binary digits is odd.
The spelling of 122221000000 in words is "one hundred twenty-two billion, two hundred twenty-one million", and thus it is an aban number.