13321031123 has 4 divisors (see below), whose sum is σ = 13470705720. Its totient is φ = 13171356528.

The previous prime is 13321031107. The next prime is 13321031177. The reversal of 13321031123 is 32113012331.

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 13321031123 - 2⁴ = 13321031107 is a prime.

It is a super-2 number, since 2×13321031123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13321031095 and 13321031104.

It is not an unprimeable number, because it can be changed into a prime (13321631123) 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, 74837165 + ... + 74837342.

It is an arithmetic number, because the mean of its divisors is an integer number (3367676430).

Almost surely, 2^13321031123 is an apocalyptic number.

13321031123 is a deficient number, since it is larger than the sum of its proper divisors (149674597).

13321031123 is an equidigital number, since it uses as much as digits as its factorization.

13321031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149674596.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13321031123 its reverse (32113012331), we get a palindrome (45434043454).

The spelling of 13321031123 in words is "thirteen billion, three hundred twenty-one million, thirty-one thousand, one hundred twenty-three".