12131222233 has 4 divisors (see below), whose sum is σ = 13064393188. Its totient is φ = 11198051280.

The previous prime is 12131222231. The next prime is 12131222293. The reversal of 12131222233 is 33222213121.

12131222233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6322953289 + 5808268944 = 79517^2 + 76212^2 .

It is not a de Polignac number, because 12131222233 - 2¹ = 12131222231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131222231) 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 3 ways as a sum of consecutive naturals, for example, 466585458 + ... + 466585483.

It is an arithmetic number, because the mean of its divisors is an integer number (3266098297).

Almost surely, 2^12131222233 is an apocalyptic number.

12131222233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12131222233 is a deficient number, since it is larger than the sum of its proper divisors (933170955).

12131222233 is an equidigital number, since it uses as much as digits as its factorization.

12131222233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933170954.

The product of its digits is 864, while the sum is 22.

Adding to 12131222233 its reverse (33222213121), we get a palindrome (45353435354).

The spelling of 12131222233 in words is "twelve billion, one hundred thirty-one million, two hundred twenty-two thousand, two hundred thirty-three".