13431321123 has 32 divisors (see below), whose sum is σ = 20169879552. Its totient is φ = 7878585600.

The previous prime is 13431321047. The next prime is 13431321199. The reversal of 13431321123 is 32112313431.

It is an interprime number because it is at equal distance from previous prime (13431321047) and next prime (13431321199).

It is not a de Polignac number, because 13431321123 - 2²⁴ = 13414543907 is a prime.

It is a super-2 number, since 2×13431321123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13431321093 and 13431321102.

It is not an unprimeable number, because it can be changed into a prime (13431321023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204415 + ... + 262007.

It is an arithmetic number, because the mean of its divisors is an integer number (630308736).

Almost surely, 2^13431321123 is an apocalyptic number.

13431321123 is a deficient number, since it is larger than the sum of its proper divisors (6738558429).

13431321123 is a wasteful number, since it uses less digits than its factorization.

13431321123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57835.

The product of its digits is 1296, while the sum is 24.

Adding to 13431321123 its reverse (32112313431), we get a palindrome (45543634554).

The spelling of 13431321123 in words is "thirteen billion, four hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-three".