Adding to 1212022320000 its reverse (232202121), we get a palindrome (1212254522121).
It is a happy number.
It is a tau number, because it is divible by the number of its divisors (640).
It is a congruent number.
Almost surely, 21212022320000 is an apocalyptic number.
1212022320000 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 1212022320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116890190800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1212022320000 is an equidigital number, since it uses as much as digits as its factorization.
1212022320000 is an evil number, because the sum of its binary digits is even.
The spelling of 1212022320000 in words is "one trillion, two hundred twelve billion, twenty-two million, three hundred twenty thousand".