12003021311 has 4 divisors (see below), whose sum is σ = 12003256800. Its totient is φ = 12002785824.

The previous prime is 12003021287. The next prime is 12003021337. The reversal of 12003021311 is 11312030021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11312030021 = 24133 ⋅468737.

It is a cyclic number.

It is not a de Polignac number, because 12003021311 - 2¹⁰ = 12003020287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003021361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5831 + ... + 155048.

It is an arithmetic number, because the mean of its divisors is an integer number (3000814200).

Almost surely, 2^12003021311 is an apocalyptic number.

12003021311 is a deficient number, since it is larger than the sum of its proper divisors (235489).

12003021311 is an equidigital number, since it uses as much as digits as its factorization.

12003021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235488.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12003021311 its reverse (11312030021), we get a palindrome (23315051332).

The spelling of 12003021311 in words is "twelve billion, three million, twenty-one thousand, three hundred eleven".