12311031203 has 4 divisors (see below), whose sum is σ = 12312219408. Its totient is φ = 12309843000.

The previous prime is 12311031181. The next prime is 12311031217. The reversal of 12311031203 is 30213011321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30213011321 = 103 ⋅293330207.

It is a cyclic number.

It is not a de Polignac number, because 12311031203 - 2¹⁴ = 12311014819 is a prime.

It is a super-2 number, since 2×12311031203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311031223) 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, 578423 + ... + 599328.

It is an arithmetic number, because the mean of its divisors is an integer number (3078054852).

Almost surely, 2^12311031203 is an apocalyptic number.

12311031203 is a deficient number, since it is larger than the sum of its proper divisors (1188205).

12311031203 is a wasteful number, since it uses less digits than its factorization.

12311031203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188204.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12311031203 its reverse (30213011321), we get a palindrome (42524042524).

The spelling of 12311031203 in words is "twelve billion, three hundred eleven million, thirty-one thousand, two hundred three".