13123305423123 has 16 divisors (see below), whose sum is σ = 19999702703616. Its totient is φ = 7498174826880.

The previous prime is 13123305423047. The next prime is 13123305423133. The reversal of 13123305423123 is 32132450332131.

It is not a de Polignac number, because 13123305423123 - 2¹² = 13123305419027 is a prime.

It is a super-2 number, since 2×13123305423123² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13123305423133) 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 15 ways as a sum of consecutive naturals, for example, 35513623 + ... + 35881248.

It is an arithmetic number, because the mean of its divisors is an integer number (1249981418976).

Almost surely, 2^{13123305423123} is an apocalyptic number.

13123305423123 is a deficient number, since it is larger than the sum of its proper divisors (6876397280493).

13123305423123 is an equidigital number, since it uses as much as digits as its factorization.

13123305423123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71403634.

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 13123305423123 its reverse (32132450332131), we get a palindrome (45255755755254).

The spelling of 13123305423123 in words is "thirteen trillion, one hundred twenty-three billion, three hundred five million, four hundred twenty-three thousand, one hundred twenty-three".