12311000203 has 4 divisors (see below), whose sum is σ = 12315417120. Its totient is φ = 12306583288.

The previous prime is 12311000189. The next prime is 12311000213. The reversal of 12311000203 is 30200011321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30200011321 = 881 ⋅34279241.

It is a cyclic number.

It is not a de Polignac number, because 12311000203 - 2²¹ = 12308903051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311000213) 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, 2204275 + ... + 2209852.

It is an arithmetic number, because the mean of its divisors is an integer number (3078854280).

Almost surely, 2^12311000203 is an apocalyptic number.

12311000203 is a deficient number, since it is larger than the sum of its proper divisors (4416917).

12311000203 is an equidigital number, since it uses as much as digits as its factorization.

12311000203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416916.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 12311000203 its reverse (30200011321), we get a palindrome (42511011524).

The spelling of 12311000203 in words is "twelve billion, three hundred eleven million, two hundred three", and thus it is an aban number.