Adding to 21003321010301 its reverse (10301012330012), we get a palindrome (31304333340313).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a self number, because there is not a number n which added to its sum of digits gives 21003321010301.
It is a congruent number.
Almost surely, 221003321010301 is an apocalyptic number.
It is an amenable number.
21003321010301 is an equidigital number, since it uses as much as digits as its factorization.
21003321010301 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 77328811.
The spelling of 21003321010301 in words is "twenty-one trillion, three billion, three hundred twenty-one million, ten thousand, three hundred one".