12442121431 has 4 divisors (see below), whose sum is σ = 12454308664. Its totient is φ = 12429934200.

The previous prime is 12442121429. The next prime is 12442121441. The reversal of 12442121431 is 13412124421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13412124421 = 29 ⋅462487049.

It is a cyclic number.

It is not a de Polignac number, because 12442121431 - 2¹ = 12442121429 is a prime.

It is a super-2 number, since 2×12442121431² (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 = 12442121396 and 12442121405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442121441) 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, 6092085 + ... + 6094126.

It is an arithmetic number, because the mean of its divisors is an integer number (3113577166).

Almost surely, 2^12442121431 is an apocalyptic number.

12442121431 is a deficient number, since it is larger than the sum of its proper divisors (12187233).

12442121431 is a wasteful number, since it uses less digits than its factorization.

12442121431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12187232.

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

Adding to 12442121431 its reverse (13412124421), we get a palindrome (25854245852).

The spelling of 12442121431 in words is "twelve billion, four hundred forty-two million, one hundred twenty-one thousand, four hundred thirty-one".