200120001 has 4 divisors (see below), whose sum is σ = 266826672. Its totient is φ = 133413332.

The previous prime is 200119901. The next prime is 200120017. The reversal of 200120001 is 100021002.

It is a happy number.

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 200120001 - 2²⁵ = 166565569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (200120201) 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, 33353331 + ... + 33353336.

It is an arithmetic number, because the mean of its divisors is an integer number (66706668).

Almost surely, 2^200120001 is an apocalyptic number.

It is an amenable number.

200120001 is a deficient number, since it is larger than the sum of its proper divisors (66706671).

200120001 is an equidigital number, since it uses as much as digits as its factorization.

200120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66706670.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 200120001 is about 14146.3776635576. The cubic root of 200120001 is about 584.9204859420.

Adding to 200120001 its reverse (100021002), we get a palindrome (300141003).

The spelling of 200120001 in words is "two hundred million, one hundred twenty thousand, one".