13500320123 has 2 divisors, whose sum is σ = 13500320124. Its totient is φ = 13500320122.

The previous prime is 13500320117. The next prime is 13500320137. The reversal of 13500320123 is 32102300531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13500320123 - 2¹⁰ = 13500319099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13500320095 and 13500320104.

It is not a weakly prime, because it can be changed into another prime (13500320423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6750160061 + 6750160062.

It is an arithmetic number, because the mean of its divisors is an integer number (6750160062).

Almost surely, 2^13500320123 is an apocalyptic number.

13500320123 is a deficient number, since it is larger than the sum of its proper divisors (1).

13500320123 is an equidigital number, since it uses as much as digits as its factorization.

13500320123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 13500320123 its reverse (32102300531), we get a palindrome (45602620654).

The spelling of 13500320123 in words is "thirteen billion, five hundred million, three hundred twenty thousand, one hundred twenty-three".