Adding to 212102103120 its reverse (21301201212), we get a palindrome (233403304332).
It is a tau number, because it is divible by the number of its divisors (40).
It is a self number, because there is not a number n which added to its sum of digits gives 212102103120.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2212102103120 is an apocalyptic number.
212102103120 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 pseudoperfect number, because it is the sum of a subset of its proper divisors.
212102103120 is a wasteful number, since it uses less digits than its factorization.
212102103120 is an evil number, because the sum of its binary digits is even.
The spelling of 212102103120 in words is "two hundred twelve billion, one hundred two million, one hundred three thousand, one hundred twenty".