2001800201 has 4 divisors (see below), whose sum is σ = 2119553172. Its totient is φ = 1884047232.

The previous prime is 2001800179. The next prime is 2001800209. The reversal of 2001800201 is 1020081002.

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 1654536976 + 347263225 = 40676^2 + 18635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001800201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001800209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58876460 + ... + 58876493.

It is an arithmetic number, because the mean of its divisors is an integer number (529888293).

Almost surely, 2^2001800201 is an apocalyptic number.

It is an amenable number.

2001800201 is a deficient number, since it is larger than the sum of its proper divisors (117752971).

2001800201 is a wasteful number, since it uses less digits than its factorization.

2001800201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117752970.

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

The square root of 2001800201 is about 44741.4818820298. The cubic root of 2001800201 is about 1260.2989550557.

Adding to 2001800201 its reverse (1020081002), we get a palindrome (3021881203).

The spelling of 2001800201 in words is "two billion, one million, eight hundred thousand, two hundred one".