12312121323 has 16 divisors (see below), whose sum is σ = 16640115200. Its totient is φ = 8096306400.

The previous prime is 12312121321. The next prime is 12312121331. The reversal of 12312121323 is 32312121321.

It is not a de Polignac number, because 12312121323 - 2¹ = 12312121321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12312121323.

It is not an unprimeable number, because it can be changed into a prime (12312121321) 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, 224373 + ... + 273801.

It is an arithmetic number, because the mean of its divisors is an integer number (1040007200).

Almost surely, 2^12312121323 is an apocalyptic number.

12312121323 is a deficient number, since it is larger than the sum of its proper divisors (4327993877).

12312121323 is a wasteful number, since it uses less digits than its factorization.

12312121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50562.

The product of its digits is 432, while the sum is 21.

Adding to 12312121323 its reverse (32312121321), we get a palindrome (44624242644).

The spelling of 12312121323 in words is "twelve billion, three hundred twelve million, one hundred twenty-one thousand, three hundred twenty-three".