13123343342513 has 4 divisors (see below), whose sum is σ = 13895304715620. Its totient is φ = 12351381969408.

The previous prime is 13123343342507. The next prime is 13123343342563. The reversal of 13123343342513 is 31524334332131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7569723223969 + 5553620118544 = 2751313^2 + 2356612^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123343342513 - 2⁴ = 13123343342497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13123343342563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385980686528 + ... + 385980686561.

It is an arithmetic number, because the mean of its divisors is an integer number (3473826178905).

Almost surely, 2^{13123343342513} is an apocalyptic number.

It is an amenable number.

13123343342513 is a deficient number, since it is larger than the sum of its proper divisors (771961373107).

13123343342513 is an equidigital number, since it uses as much as digits as its factorization.

13123343342513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771961373106.

The product of its digits is 233280, while the sum is 38.

Adding to 13123343342513 its reverse (31524334332131), we get a palindrome (44647677674644).

The spelling of 13123343342513 in words is "thirteen trillion, one hundred twenty-three billion, three hundred forty-three million, three hundred forty-two thousand, five hundred thirteen".