12111312331 has 16 divisors (see below), whose sum is σ = 12909948480. Its totient is φ = 11336490880.

The previous prime is 12111312319. The next prime is 12111312413. The reversal of 12111312331 is 13321311121.

It is a cyclic number.

It is not a de Polignac number, because 12111312331 - 2⁷ = 12111312203 is a prime.

It is a super-2 number, since 2×12111312331² (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 = 12111312299 and 12111312308.

It is not an unprimeable number, because it can be changed into a prime (12111322331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461421 + ... + 486961.

It is an arithmetic number, because the mean of its divisors is an integer number (806871780).

Almost surely, 2^12111312331 is an apocalyptic number.

12111312331 is a deficient number, since it is larger than the sum of its proper divisors (798636149).

12111312331 is a wasteful number, since it uses less digits than its factorization.

12111312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26006.

The product of its digits is 108, while the sum is 19.

Adding to 12111312331 its reverse (13321311121), we get a palindrome (25432623452).

The spelling of 12111312331 in words is "twelve billion, one hundred eleven million, three hundred twelve thousand, three hundred thirty-one".