1321103317 has 2 divisors, whose sum is σ = 1321103318. Its totient is φ = 1321103316.

The previous prime is 1321103309. The next prime is 1321103321. The reversal of 1321103317 is 7133011231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679697041 + 641406276 = 26071^2 + 25326^2 .

It is an emirp because it is prime and its reverse (7133011231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321103317 - 2³ = 1321103309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321103327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660551658 + 660551659.

It is an arithmetic number, because the mean of its divisors is an integer number (660551659).

Almost surely, 2^1321103317 is an apocalyptic number.

It is an amenable number.

1321103317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321103317 is an equidigital number, since it uses as much as digits as its factorization.

1321103317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1321103317 is about 36346.9849781244. The cubic root of 1321103317 is about 1097.2668556915.

Adding to 1321103317 its reverse (7133011231), we get a palindrome (8454114548).

The spelling of 1321103317 in words is "one billion, three hundred twenty-one million, one hundred three thousand, three hundred seventeen".