1313221003243 has 2 divisors, whose sum is σ = 1313221003244. Its totient is φ = 1313221003242.

The previous prime is 1313221003231. The next prime is 1313221003249. The reversal of 1313221003243 is 3423001223131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313221003243 - 2²¹ = 1313218906091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313221003249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656610501621 + 656610501622.

It is an arithmetic number, because the mean of its divisors is an integer number (656610501622).

Almost surely, 2^{1313221003243} is an apocalyptic number.

1313221003243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313221003243 is an equidigital number, since it uses as much as digits as its factorization.

1313221003243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1313221003243 its reverse (3423001223131), we get a palindrome (4736222226374).

The spelling of 1313221003243 in words is "one trillion, three hundred thirteen billion, two hundred twenty-one million, three thousand, two hundred forty-three".