It is a cyclic number.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 21012222002111.
It is a congruent number.
Almost surely, 221012222002111 is an apocalyptic number.
21012222002111 is a wasteful number, since it uses less digits than its factorization.
21012222002111 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 382438.
Adding to 21012222002111 its reverse (11120022221012), we get a palindrome (32132244223123).
The spelling of 21012222002111 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, two thousand, one hundred eleven".