13520413303123 has 4 divisors (see below), whose sum is σ = 13549741748928. Its totient is φ = 13491084857320.

The previous prime is 13520413303121. The next prime is 13520413303171. The reversal of 13520413303123 is 32130331402531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13520413303123 - 2¹ = 13520413303121 is a prime.

It is a super-3 number, since 3×13520413303123³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520413303121) 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, 14664222211 + ... + 14664223132.

It is an arithmetic number, because the mean of its divisors is an integer number (3387435437232).

Almost surely, 2^{13520413303123} is an apocalyptic number.

13520413303123 is a deficient number, since it is larger than the sum of its proper divisors (29328445805).

13520413303123 is an equidigital number, since it uses as much as digits as its factorization.

13520413303123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29328445804.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 13520413303123 its reverse (32130331402531), we get a palindrome (45650744705654).

The spelling of 13520413303123 in words is "thirteen trillion, five hundred twenty billion, four hundred thirteen million, three hundred three thousand, one hundred twenty-three".