13121323 has 4 divisors (see below), whose sum is σ = 13130208. Its totient is φ = 13112440.

The previous prime is 13121309. The next prime is 13121327. The reversal of 13121323 is 32312131.

13121323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32312131 = 2399 ⋅13469.

It is a cyclic number.

It is not a de Polignac number, because 13121323 - 2⁵ = 13121291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121297 and 13121306.

It is not an unprimeable number, because it can be changed into a prime (13121327) 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, 1636 + ... + 5377.

It is an arithmetic number, because the mean of its divisors is an integer number (3282552).

Almost surely, 2^13121323 is an apocalyptic number.

13121323 is a deficient number, since it is larger than the sum of its proper divisors (8885).

13121323 is an equidigital number, since it uses as much as digits as its factorization.

13121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8884.

The product of its digits is 108, while the sum is 16.

The square root of 13121323 is about 3622.3366767875. The cubic root of 13121323 is about 235.8626690718.

Adding to 13121323 its reverse (32312131), we get a palindrome (45433454).

The spelling of 13121323 in words is "thirteen million, one hundred twenty-one thousand, three hundred twenty-three".