200121220211984 has 80 divisors (see below), whose sum is σ = 399850134203520. Its totient is φ = 96967575505920.

The previous prime is 200121220211981. The next prime is 200121220211993. The reversal of 200121220211984 is 489112022121002.

It is not an unprimeable number, because it can be changed into a prime (200121220211981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155910647 + ... + 157188969.

It is an arithmetic number, because the mean of its divisors is an integer number (4998126677544).

Almost surely, 2^{200121220211984} is an apocalyptic number.

It is an amenable number.

200121220211984 is a deficient number, since it is larger than the sum of its proper divisors (199728913991536).

200121220211984 is a wasteful number, since it uses less digits than its factorization.

200121220211984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279968 (or 1279962 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

Adding to 200121220211984 its reverse (489112022121002), we get a palindrome (689233242332986).

The spelling of 200121220211984 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, nine hundred eighty-four".