203413404314321 has 2 divisors, whose sum is σ = 203413404314322. Its totient is φ = 203413404314320.

The previous prime is 203413404314233. The next prime is 203413404314357. The reversal of 203413404314321 is 123413404314302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115348974724096 + 88064429590225 = 10740064^2 + 9384265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203413404314321 is a prime.

It is not a weakly prime, because it can be changed into another prime (203413404334321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101706702157160 + 101706702157161.

It is an arithmetic number, because the mean of its divisors is an integer number (101706702157161).

Almost surely, 2^{203413404314321} is an apocalyptic number.

It is an amenable number.

203413404314321 is a deficient number, since it is larger than the sum of its proper divisors (1).

203413404314321 is an equidigital number, since it uses as much as digits as its factorization.

203413404314321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 203413404314321 its reverse (123413404314302), we get a palindrome (326826808628623).

The spelling of 203413404314321 in words is "two hundred three trillion, four hundred thirteen billion, four hundred four million, three hundred fourteen thousand, three hundred twenty-one".