203130320221 has 4 divisors (see below), whose sum is σ = 203696143200. Its totient is φ = 202564497244.

The previous prime is 203130320209. The next prime is 203130320227. The reversal of 203130320221 is 122023031302.

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 203130320221 - 2²⁷ = 202996102493 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 (203130320227) 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, 282910951 + ... + 282911668.

It is an arithmetic number, because the mean of its divisors is an integer number (50924035800).

Almost surely, 2^203130320221 is an apocalyptic number.

It is an amenable number.

203130320221 is a deficient number, since it is larger than the sum of its proper divisors (565822979).

203130320221 is an equidigital number, since it uses as much as digits as its factorization.

203130320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565822978.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203130320221 its reverse (122023031302), we get a palindrome (325153351523).

The spelling of 203130320221 in words is "two hundred three billion, one hundred thirty million, three hundred twenty thousand, two hundred twenty-one".