200121021121121 has 8 divisors (see below), whose sum is σ = 200184606115200. Its totient is φ = 200057437129680.

The previous prime is 200121021121111. The next prime is 200121021121123. The reversal of 200121021121121 is 121121120121002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200121021121121 - 2³⁸ = 199846143214177 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 200121021121121.

It is not an unprimeable number, because it can be changed into a prime (200121021121123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781842200 + ... + 782098118.

It is an arithmetic number, because the mean of its divisors is an integer number (25023075764400).

Almost surely, 2^{200121021121121} is an apocalyptic number.

It is an amenable number.

200121021121121 is a deficient number, since it is larger than the sum of its proper divisors (63584994079).

200121021121121 is a wasteful number, since it uses less digits than its factorization.

200121021121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501319.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 200121021121121 its reverse (121121120121002), we get a palindrome (321242141242123).

The spelling of 200121021121121 in words is "two hundred trillion, one hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".