200021122121 has 16 divisors (see below), whose sum is σ = 209138478336. Its totient is φ = 190939262976.

The previous prime is 200021122111. The next prime is 200021122141. The reversal of 200021122121 is 121221120002.

It is a cyclic number.

It is not a de Polignac number, because 200021122121 - 2⁶ = 200021122057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200021122096 and 200021122105.

It is not an unprimeable number, because it can be changed into a prime (200021122111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26064341 + ... + 26072013.

It is an arithmetic number, because the mean of its divisors is an integer number (13071154896).

Almost surely, 2^200021122121 is an apocalyptic number.

It is an amenable number.

200021122121 is a deficient number, since it is larger than the sum of its proper divisors (9117356215).

200021122121 is a wasteful number, since it uses less digits than its factorization.

200021122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9832.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200021122121 its reverse (121221120002), we get a palindrome (321242242123).

The spelling of 200021122121 in words is "two hundred billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".