12003011305 has 4 divisors (see below), whose sum is σ = 14403613572. Its totient is φ = 9602409040.

The previous prime is 12003011299. The next prime is 12003011309. The reversal of 12003011305 is 50311030021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50311030021 = 7 ⋅7187290003.

It can be written as a sum of positive squares in 2 ways, for example, as 4479357184 + 7523654121 = 66928^2 + 86739^2 .

It is not a de Polignac number, because 12003011305 - 2⁹ = 12003010793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12003011309) 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, 1200301126 + ... + 1200301135.

It is an arithmetic number, because the mean of its divisors is an integer number (3600903393).

Almost surely, 2^12003011305 is an apocalyptic number.

It is an amenable number.

12003011305 is a deficient number, since it is larger than the sum of its proper divisors (2400602267).

12003011305 is an equidigital number, since it uses as much as digits as its factorization.

12003011305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400602266.

The product of its (nonzero) digits is 90, while the sum is 16.

Adding to 12003011305 its reverse (50311030021), we get a palindrome (62314041326).

The spelling of 12003011305 in words is "twelve billion, three million, eleven thousand, three hundred five".