12343431121 has 4 divisors (see below), whose sum is σ = 14106778432. Its totient is φ = 10580083812.

The previous prime is 12343431097. The next prime is 12343431181. The reversal of 12343431121 is 12113434321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12113434321 = 71 ⋅170611751.

It is a cyclic number.

It is not a de Polignac number, because 12343431121 - 2²¹ = 12341333969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12343431181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881673645 + ... + 881673658.

It is an arithmetic number, because the mean of its divisors is an integer number (3526694608).

Almost surely, 2^12343431121 is an apocalyptic number.

It is an amenable number.

12343431121 is a deficient number, since it is larger than the sum of its proper divisors (1763347311).

12343431121 is an equidigital number, since it uses as much as digits as its factorization.

12343431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763347310.

The product of its digits is 1728, while the sum is 25.

Adding to 12343431121 its reverse (12113434321), we get a palindrome (24456865442).

The spelling of 12343431121 in words is "twelve billion, three hundred forty-three million, four hundred thirty-one thousand, one hundred twenty-one".