It is a self number, because there is not a number n which added to its sum of digits gives 121220111220202.
It is an unprimeable number.
Almost surely, 2121220111220202 is an apocalyptic number.
121220111220202 is a wasteful number, since it uses less digits than its factorization.
121220111220202 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 98986.
Adding to 121220111220202 its reverse (202022111022121), we get a palindrome (323242222242323).
The spelling of 121220111220202 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred two".