203421331313 has 2 divisors, whose sum is σ = 203421331314. Its totient is φ = 203421331312.

The previous prime is 203421331297. The next prime is 203421331327. The reversal of 203421331313 is 313133124302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113321103424 + 90100227889 = 336632^2 + 300167^2 .

It is a cyclic number.

It is not a de Polignac number, because 203421331313 - 2⁴ = 203421331297 is a prime.

It is not a weakly prime, because it can be changed into another prime (203421331363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101710665656 + 101710665657.

It is an arithmetic number, because the mean of its divisors is an integer number (101710665657).

Almost surely, 2^203421331313 is an apocalyptic number.

It is an amenable number.

203421331313 is a deficient number, since it is larger than the sum of its proper divisors (1).

203421331313 is an equidigital number, since it uses as much as digits as its factorization.

203421331313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 203421331313 its reverse (313133124302), we get a palindrome (516554455615).

The spelling of 203421331313 in words is "two hundred three billion, four hundred twenty-one million, three hundred thirty-one thousand, three hundred thirteen".