12042123431 has 4 divisors (see below), whose sum is σ = 12968440632. Its totient is φ = 11115806232.

The previous prime is 12042123421. The next prime is 12042123437. The reversal of 12042123431 is 13432124021.

12042123431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12042123431 is a prime.

It is a super-2 number, since 2×12042123431² (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 = 12042123397 and 12042123406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042123437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463158581 + ... + 463158606.

It is an arithmetic number, because the mean of its divisors is an integer number (3242110158).

Almost surely, 2^12042123431 is an apocalyptic number.

12042123431 is a deficient number, since it is larger than the sum of its proper divisors (926317201).

12042123431 is an equidigital number, since it uses as much as digits as its factorization.

12042123431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926317200.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12042123431 its reverse (13432124021), we get a palindrome (25474247452).

The spelling of 12042123431 in words is "twelve billion, forty-two million, one hundred twenty-three thousand, four hundred thirty-one".