13431313123 has 16 divisors (see below), whose sum is σ = 14499303840. Its totient is φ = 12400128000.

The previous prime is 13431313099. The next prime is 13431313127. The reversal of 13431313123 is 32131313431.

It is a cyclic number.

It is not a de Polignac number, because 13431313123 - 2⁹ = 13431312611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13431313127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720723 + ... + 739123.

It is an arithmetic number, because the mean of its divisors is an integer number (906206490).

Almost surely, 2^13431313123 is an apocalyptic number.

13431313123 is a deficient number, since it is larger than the sum of its proper divisors (1067990717).

13431313123 is a wasteful number, since it uses less digits than its factorization.

13431313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19398.

The product of its digits is 1944, while the sum is 25.

Adding to 13431313123 its reverse (32131313431), we get a palindrome (45562626554).

The spelling of 13431313123 in words is "thirteen billion, four hundred thirty-one million, three hundred thirteen thousand, one hundred twenty-three".