13121313023123 has 4 divisors (see below), whose sum is σ = 13221475718088. Its totient is φ = 13021150328160.

The previous prime is 13121313023101. The next prime is 13121313023141. The reversal of 13121313023123 is 32132031312131.

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 13121313023123 - 2¹⁰ = 13121313022099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121313023092 and 13121313023101.

It is not an unprimeable number, because it can be changed into a prime (13121313023183) 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, 50081347286 + ... + 50081347547.

It is an arithmetic number, because the mean of its divisors is an integer number (3305368929522).

Almost surely, 2^{13121313023123} is an apocalyptic number.

13121313023123 is a deficient number, since it is larger than the sum of its proper divisors (100162694965).

13121313023123 is a wasteful number, since it uses less digits than its factorization.

13121313023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100162694964.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 13121313023123 its reverse (32132031312131), we get a palindrome (45253344335254).

The spelling of 13121313023123 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirteen million, twenty-three thousand, one hundred twenty-three".