200203232221 has 4 divisors (see below), whose sum is σ = 200211929244. Its totient is φ = 200194535200.

The previous prime is 200203232213. The next prime is 200203232249. The reversal of 200203232221 is 122232302002.

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 54317429721 + 145885802500 = 233061^2 + 381950^2 .

It is a cyclic number.

It is not a de Polignac number, because 200203232221 - 2³ = 200203232213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200203230221) 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, 4313890 + ... + 4360051.

It is an arithmetic number, because the mean of its divisors is an integer number (50052982311).

Almost surely, 2^200203232221 is an apocalyptic number.

It is an amenable number.

200203232221 is a deficient number, since it is larger than the sum of its proper divisors (8697023).

200203232221 is an equidigital number, since it uses as much as digits as its factorization.

200203232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8697022.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 200203232221 its reverse (122232302002), we get a palindrome (322435534223).

The spelling of 200203232221 in words is "two hundred billion, two hundred three million, two hundred thirty-two thousand, two hundred twenty-one".