200021011121 has 4 divisors (see below), whose sum is σ = 200438592000. Its totient is φ = 199603430244.

The previous prime is 200021011117. The next prime is 200021011129. The reversal of 200021011121 is 121110120002.

200021011121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200021011121 - 2² = 200021011117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200021011129) 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 3 ways as a sum of consecutive naturals, for example, 208789721 + ... + 208790678.

It is an arithmetic number, because the mean of its divisors is an integer number (50109648000).

Almost surely, 2^200021011121 is an apocalyptic number.

It is an amenable number.

200021011121 is a deficient number, since it is larger than the sum of its proper divisors (417580879).

200021011121 is an equidigital number, since it uses as much as digits as its factorization.

200021011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417580878.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200021011121 its reverse (121110120002), we get a palindrome (321131131123).

The spelling of 200021011121 in words is "two hundred billion, twenty-one million, eleven thousand, one hundred twenty-one".