12011440503 has 4 divisors (see below), whose sum is σ = 16015254008. Its totient is φ = 8007627000.

The previous prime is 12011440439. The next prime is 12011440537. The reversal of 12011440503 is 30504411021.

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

It is not a de Polignac number, because 12011440503 - 2⁶ = 12011440439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12011440503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011440543) 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, 2001906748 + ... + 2001906753.

It is an arithmetic number, because the mean of its divisors is an integer number (4003813502).

Almost surely, 2^12011440503 is an apocalyptic number.

12011440503 is a deficient number, since it is larger than the sum of its proper divisors (4003813505).

12011440503 is an equidigital number, since it uses as much as digits as its factorization.

12011440503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003813504.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12011440503 its reverse (30504411021), we get a palindrome (42515851524).

The spelling of 12011440503 in words is "twelve billion, eleven million, four hundred forty thousand, five hundred three".