12111142431 has 48 divisors (see below), whose sum is σ = 18117299808. Its totient is φ = 7170508800.

The previous prime is 12111142411. The next prime is 12111142447. The reversal of 12111142431 is 13424111121.

It is not a de Polignac number, because 12111142431 - 2⁹ = 12111141919 is a prime.

It is a super-2 number, since 2×12111142431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12111142398 and 12111142407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111142411) 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 47 ways as a sum of consecutive naturals, for example, 5172321 + ... + 5174661.

It is an arithmetic number, because the mean of its divisors is an integer number (377443746).

Almost surely, 2^12111142431 is an apocalyptic number.

12111142431 is a deficient number, since it is larger than the sum of its proper divisors (6006157377).

12111142431 is a wasteful number, since it uses less digits than its factorization.

12111142431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680 (or 2661 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

Adding to 12111142431 its reverse (13424111121), we get a palindrome (25535253552).

The spelling of 12111142431 in words is "twelve billion, one hundred eleven million, one hundred forty-two thousand, four hundred thirty-one".