It is a happy number.
12020020211999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is a congruent number.
Almost surely, 212020020211999 is an apocalyptic number.
12020020211999 is an equidigital number, since it uses as much as digits as its factorization.
12020020211999 is an evil number, because the sum of its binary digits is even.
The spelling of 12020020211999 in words is "twelve trillion, twenty billion, twenty million, two hundred eleven thousand, nine hundred ninety-nine".