Adding to 211202210121200 its reverse (2121012202112), we get a palindrome (213323222323312).
It is a congruent number.
It is an unprimeable number.
Almost surely, 2211202210121200 is an apocalyptic number.
211202210121200 is a gapful number since it is divisible by the number (20) 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 211202210121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255881921988000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
211202210121200 is a wasteful number, since it uses less digits than its factorization.
211202210121200 is an odious number, because the sum of its binary digits is odd.
The spelling of 211202210121200 in words is "two hundred eleven trillion, two hundred two billion, two hundred ten million, one hundred twenty-one thousand, two hundred".