1321313320363 has 2 divisors, whose sum is σ = 1321313320364. Its totient is φ = 1321313320362.

The previous prime is 1321313320321. The next prime is 1321313320367. The reversal of 1321313320363 is 3630233131231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321313320363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321313320367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660656660181 + 660656660182.

It is an arithmetic number, because the mean of its divisors is an integer number (660656660182).

Almost surely, 2^{1321313320363} is an apocalyptic number.

1321313320363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321313320363 is an equidigital number, since it uses as much as digits as its factorization.

1321313320363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 31.

Adding to 1321313320363 its reverse (3630233131231), we get a palindrome (4951546451594).

The spelling of 1321313320363 in words is "one trillion, three hundred twenty-one billion, three hundred thirteen million, three hundred twenty thousand, three hundred sixty-three".