12311031011 has 4 divisors (see below), whose sum is σ = 12311254800. Its totient is φ = 12310807224.

The previous prime is 12311030993. The next prime is 12311031043. The reversal of 12311031011 is 11013011321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11013011321 = 13 ⋅847154717.

It is a cyclic number.

It is not a de Polignac number, because 12311031011 - 2¹⁸ = 12310768867 is a prime.

It is a super-2 number, since 2×12311031011² (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 (12311031511) 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, 34250 + ... + 160608.

It is an arithmetic number, because the mean of its divisors is an integer number (3077813700).

Almost surely, 2^12311031011 is an apocalyptic number.

12311031011 is a deficient number, since it is larger than the sum of its proper divisors (223789).

12311031011 is an equidigital number, since it uses as much as digits as its factorization.

12311031011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223788.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 12311031011 its reverse (11013011321), we get a palindrome (23324042332).

The spelling of 12311031011 in words is "twelve billion, three hundred eleven million, thirty-one thousand, eleven".