12311203 has 4 divisors (see below), whose sum is σ = 12513088. Its totient is φ = 12109320.

The previous prime is 12311191. The next prime is 12311207. The reversal of 12311203 is 30211321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30211321 = 7 ⋅4315903.

It is a cyclic number.

It is not a de Polignac number, because 12311203 - 2²¹ = 10214051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311207) 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, 100851 + ... + 100972.

It is an arithmetic number, because the mean of its divisors is an integer number (3128272).

Almost surely, 2^12311203 is an apocalyptic number.

12311203 is a deficient number, since it is larger than the sum of its proper divisors (201885).

12311203 is an equidigital number, since it uses as much as digits as its factorization.

12311203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201884.

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

The square root of 12311203 is about 3508.7323921895. The cubic root of 12311203 is about 230.9050852230.

Adding to 12311203 its reverse (30211321), we get a palindrome (42522524).

The spelling of 12311203 in words is "twelve million, three hundred eleven thousand, two hundred three".