200121220210121 has 32 divisors (see below), whose sum is σ = 233739601674240. Its totient is φ = 167765394303936.

The previous prime is 200121220210103. The next prime is 200121220210151. The reversal of 200121220210121 is 121012022121002.

It is a cyclic number.

It is not a de Polignac number, because 200121220210121 - 2³⁸ = 199846342303177 is a prime.

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 200121220210121.

It is not an unprimeable number, because it can be changed into a prime (200121220210151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3187982891 + ... + 3188045663.

It is an arithmetic number, because the mean of its divisors is an integer number (7304362552320).

Almost surely, 2^{200121220210121} is an apocalyptic number.

It is an amenable number.

200121220210121 is a deficient number, since it is larger than the sum of its proper divisors (33618381464119).

200121220210121 is a wasteful number, since it uses less digits than its factorization.

200121220210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69453.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200121220210121 its reverse (121012022121002), we get a palindrome (321133242331123).

The spelling of 200121220210121 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-one".