12142142431 has 4 divisors (see below), whose sum is σ = 12371239512. Its totient is φ = 11913045352.

The previous prime is 12142142423. The next prime is 12142142437. The reversal of 12142142431 is 13424124121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12142142431 - 2³ = 12142142423 is a prime.

It is a super-2 number, since 2×12142142431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12142142396 and 12142142405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142142437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114548461 + ... + 114548566.

It is an arithmetic number, because the mean of its divisors is an integer number (3092809878).

Almost surely, 2^12142142431 is an apocalyptic number.

12142142431 is a deficient number, since it is larger than the sum of its proper divisors (229097081).

12142142431 is an equidigital number, since it uses as much as digits as its factorization.

12142142431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229097080.

The product of its digits is 1536, while the sum is 25.

Adding to 12142142431 its reverse (13424124121), we get a palindrome (25566266552).

The spelling of 12142142431 in words is "twelve billion, one hundred forty-two million, one hundred forty-two thousand, four hundred thirty-one".