12431123211 has 16 divisors (see below), whose sum is σ = 18332247584. Its totient is φ = 7443166464.

The previous prime is 12431123203. The next prime is 12431123213. The reversal of 12431123211 is 11232113421.

It is not a de Polignac number, because 12431123211 - 2³ = 12431123203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12431123213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4305946 + ... + 4308831.

It is an arithmetic number, because the mean of its divisors is an integer number (1145765474).

Almost surely, 2^12431123211 is an apocalyptic number.

12431123211 is a deficient number, since it is larger than the sum of its proper divisors (5901124373).

12431123211 is a wasteful number, since it uses less digits than its factorization.

12431123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8614830.

The product of its digits is 288, while the sum is 21.

Adding to 12431123211 its reverse (11232113421), we get a palindrome (23663236632).

The spelling of 12431123211 in words is "twelve billion, four hundred thirty-one million, one hundred twenty-three thousand, two hundred eleven".