200021201211121 has 4 divisors (see below), whose sum is σ = 200108432439412. Its totient is φ = 199933969982832.

The previous prime is 200021201211119. The next prime is 200021201211127. The reversal of 200021201211121 is 121112102120002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91068104647521 + 108953096563600 = 9542961^2 + 10438060^2 .

It is a cyclic number.

It is not a de Polignac number, because 200021201211121 - 2¹ = 200021201211119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200021201211095 and 200021201211104.

It is not an unprimeable number, because it can be changed into a prime (200021201211127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43615610706 + ... + 43615615291.

It is an arithmetic number, because the mean of its divisors is an integer number (50027108109853).

Almost surely, 2^{200021201211121} is an apocalyptic number.

It is an amenable number.

200021201211121 is a deficient number, since it is larger than the sum of its proper divisors (87231228291).

200021201211121 is an equidigital number, since it uses as much as digits as its factorization.

200021201211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87231228290.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200021201211121 its reverse (121112102120002), we get a palindrome (321133303331123).

The spelling of 200021201211121 in words is "two hundred trillion, twenty-one billion, two hundred one million, two hundred eleven thousand, one hundred twenty-one".