12040424423 has 4 divisors (see below), whose sum is σ = 12159636648. Its totient is φ = 11921212200.

The previous prime is 12040424419. The next prime is 12040424441. The reversal of 12040424423 is 32442404021.

It is a happy number.

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 12040424423 - 2² = 12040424419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12040424392 and 12040424401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040424413) 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, 59605961 + ... + 59606162.

It is an arithmetic number, because the mean of its divisors is an integer number (3039909162).

Almost surely, 2^12040424423 is an apocalyptic number.

12040424423 is a deficient number, since it is larger than the sum of its proper divisors (119212225).

12040424423 is a wasteful number, since it uses less digits than its factorization.

12040424423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119212224.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 12040424423 its reverse (32442404021), we get a palindrome (44482828444).

The spelling of 12040424423 in words is "twelve billion, forty million, four hundred twenty-four thousand, four hundred twenty-three".