13123335033505 has 4 divisors (see below), whose sum is σ = 15748002040212. Its totient is φ = 10498668026800.

The previous prime is 13123335033503. The next prime is 13123335033509. The reversal of 13123335033505 is 50533053332131.

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 7255114635024 + 5868220398481 = 2693532^2 + 2422441^2 .

It is not a de Polignac number, because 13123335033505 - 2¹ = 13123335033503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13123335033503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312333503346 + ... + 1312333503355.

It is an arithmetic number, because the mean of its divisors is an integer number (3937000510053).

Almost surely, 2^{13123335033505} is an apocalyptic number.

It is an amenable number.

13123335033505 is a deficient number, since it is larger than the sum of its proper divisors (2624667006707).

13123335033505 is an equidigital number, since it uses as much as digits as its factorization.

13123335033505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624667006706.

The product of its (nonzero) digits is 182250, while the sum is 37.

Adding to 13123335033505 its reverse (50533053332131), we get a palindrome (63656388365636).

The spelling of 13123335033505 in words is "thirteen trillion, one hundred twenty-three billion, three hundred thirty-five million, thirty-three thousand, five hundred five".