It is a self number, because there is not a number n which added to its sum of digits gives 21202122202102.
It is a congruent number.
It is an unprimeable number.
Almost surely, 221202122202102 is an apocalyptic number.
21202122202102 is a wasteful number, since it uses less digits than its factorization.
21202122202102 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3236380.
Adding to 21202122202102 its reverse (20120222120212), we get a palindrome (41322344322314).
The spelling of 21202122202102 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two million, two hundred two thousand, one hundred two".