12312213233 has 4 divisors (see below), whose sum is σ = 12736772340. Its totient is φ = 11887654128.

The previous prime is 12312213227. The next prime is 12312213241. The reversal of 12312213233 is 33231221321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8829797089 + 3482416144 = 93967^2 + 59012^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312213233 - 2⁶ = 12312213169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312213199 and 12312213208.

It is not an unprimeable number, because it can be changed into a prime (12312213533) 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, 212279510 + ... + 212279567.

It is an arithmetic number, because the mean of its divisors is an integer number (3184193085).

Almost surely, 2^12312213233 is an apocalyptic number.

It is an amenable number.

12312213233 is a deficient number, since it is larger than the sum of its proper divisors (424559107).

12312213233 is an equidigital number, since it uses as much as digits as its factorization.

12312213233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424559106.

The product of its digits is 1296, while the sum is 23.

Adding to 12312213233 its reverse (33231221321), we get a palindrome (45543434554).

The spelling of 12312213233 in words is "twelve billion, three hundred twelve million, two hundred thirteen thousand, two hundred thirty-three".