12111311233 has 24 divisors (see below), whose sum is σ = 14166289800. Its totient is φ = 10324113408.

The previous prime is 12111311221. The next prime is 12111311239. The reversal of 12111311233 is 33211311121.

12111311233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 784392049 + 11326919184 = 28007^2 + 106428^2 .

It is not a de Polignac number, because 12111311233 - 2¹³ = 12111303041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12111311233.

It is not an unprimeable number, because it can be changed into a prime (12111311239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9395253 + ... + 9396541.

It is an arithmetic number, because the mean of its divisors is an integer number (590262075).

Almost surely, 2^12111311233 is an apocalyptic number.

It is an amenable number.

12111311233 is a deficient number, since it is larger than the sum of its proper divisors (2054978567).

12111311233 is a wasteful number, since it uses less digits than its factorization.

12111311233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209 (or 2202 counting only the distinct ones).

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

Adding to 12111311233 its reverse (33211311121), we get a palindrome (45322622354).

The spelling of 12111311233 in words is "twelve billion, one hundred eleven million, three hundred eleven thousand, two hundred thirty-three".