203221011313 has 4 divisors (see below), whose sum is σ = 204108439540. Its totient is φ = 202333583088.

The previous prime is 203221011299. The next prime is 203221011337. The reversal of 203221011313 is 313110122302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313110122302 = 2 ⋅156555061151.

It can be written as a sum of positive squares in 2 ways, for example, as 169190723584 + 34030287729 = 411328^2 + 184473^2 .

It is a cyclic number.

It is not a de Polignac number, because 203221011313 - 2¹³ = 203221003121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203221011113) 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, 443713770 + ... + 443714227.

It is an arithmetic number, because the mean of its divisors is an integer number (51027109885).

Almost surely, 2^203221011313 is an apocalyptic number.

It is an amenable number.

203221011313 is a deficient number, since it is larger than the sum of its proper divisors (887428227).

203221011313 is an equidigital number, since it uses as much as digits as its factorization.

203221011313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887428226.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203221011313 its reverse (313110122302), we get a palindrome (516331133615).

The spelling of 203221011313 in words is "two hundred three billion, two hundred twenty-one million, eleven thousand, three hundred thirteen".