12011440423 has 8 divisors (see below), whose sum is σ = 12746712528. Its totient is φ = 11279359104.

The previous prime is 12011440411. The next prime is 12011440433. The reversal of 12011440423 is 32404411021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12011440423 - 2¹⁷ = 12011309351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011440394 and 12011440403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011440433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789936 + ... + 804997.

It is an arithmetic number, because the mean of its divisors is an integer number (1593339066).

Almost surely, 2^12011440423 is an apocalyptic number.

12011440423 is a deficient number, since it is larger than the sum of its proper divisors (735272105).

12011440423 is a wasteful number, since it uses less digits than its factorization.

12011440423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595393.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12011440423 its reverse (32404411021), we get a palindrome (44415851444).

The spelling of 12011440423 in words is "twelve billion, eleven million, four hundred forty thousand, four hundred twenty-three".