12311031031 has 4 divisors (see below), whose sum is σ = 13258033432. Its totient is φ = 11364028632.

The previous prime is 12311030993. The next prime is 12311031043. The reversal of 12311031031 is 13013011321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13013011321 = 499 ⋅26078179.

It is a cyclic number.

It is not a de Polignac number, because 12311031031 - 2⁹ = 12311030519 is a prime.

It is a super-2 number, since 2×12311031031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12311030996 and 12311031014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311031331) 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, 473501181 + ... + 473501206.

It is an arithmetic number, because the mean of its divisors is an integer number (3314508358).

Almost surely, 2^12311031031 is an apocalyptic number.

12311031031 is a deficient number, since it is larger than the sum of its proper divisors (947002401).

12311031031 is an equidigital number, since it uses as much as digits as its factorization.

12311031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947002400.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 12311031031 its reverse (13013011321), we get a palindrome (25324042352).

The spelling of 12311031031 in words is "twelve billion, three hundred eleven million, thirty-one thousand, thirty-one".