200121220202201 has 24 divisors (see below), whose sum is σ = 211082252629920. Its totient is φ = 189698914855296.

The previous prime is 200121220202179. The next prime is 200121220202221. The reversal of 200121220202201 is 102202022121002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-200121220202201 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 200121220202201.

It is not an unprimeable number, because it can be changed into a prime (200121220202221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 419814770 + ... + 420291188.

It is an arithmetic number, because the mean of its divisors is an integer number (8795093859580).

Almost surely, 2^{200121220202201} is an apocalyptic number.

It is an amenable number.

200121220202201 is a deficient number, since it is larger than the sum of its proper divisors (10961032427719).

200121220202201 is a wasteful number, since it uses less digits than its factorization.

200121220202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483605 (or 483582 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 200121220202201 its reverse (102202022121002), we get a palindrome (302323242323203).

The spelling of 200121220202201 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred two thousand, two hundred one".