200120321 has 4 divisors (see below), whose sum is σ = 203401044. Its totient is φ = 196839600.

The previous prime is 200120317. The next prime is 200120341. The reversal of 200120321 is 123021002.

It is a happy number.

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 2436721 + 197683600 = 1561^2 + 14060^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120321 - 2² = 200120317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200120341) 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, 1640270 + ... + 1640391.

It is an arithmetic number, because the mean of its divisors is an integer number (50850261).

Almost surely, 2^200120321 is an apocalyptic number.

It is an amenable number.

200120321 is a deficient number, since it is larger than the sum of its proper divisors (3280723).

200120321 is an equidigital number, since it uses as much as digits as its factorization.

200120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280722.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 200120321 is about 14146.3889738689. The cubic root of 200120321 is about 584.9207977124.

Adding to 200120321 its reverse (123021002), we get a palindrome (323141323).

It can be divided in two parts, 2001 and 20321, that added together give a palindrome (22322).

The spelling of 200120321 in words is "two hundred million, one hundred twenty thousand, three hundred twenty-one".