200001200021 has 4 divisors (see below), whose sum is σ = 228572800032. Its totient is φ = 171429600012.

The previous prime is 200001200011. The next prime is 200001200029. The reversal of 200001200021 is 120002100002.

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 200001200021 - 2¹⁰ = 200001198997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200001199981 and 200001200008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200001200029) 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, 14285799995 + ... + 14285800008.

It is an arithmetic number, because the mean of its divisors is an integer number (57143200008).

Almost surely, 2^200001200021 is an apocalyptic number.

It is an amenable number.

200001200021 is a deficient number, since it is larger than the sum of its proper divisors (28571600011).

200001200021 is an equidigital number, since it uses as much as digits as its factorization.

200001200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28571600010.

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

Adding to 200001200021 its reverse (120002100002), we get a palindrome (320003300023).

The spelling of 200001200021 in words is "two hundred billion, one million, two hundred thousand, twenty-one".