12131222222 has 8 divisors (see below), whose sum is σ = 20796380976. Its totient is φ = 5199095232.

The previous prime is 12131222209. The next prime is 12131222231. The reversal of 12131222222 is 22222213121.

12131222222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12131222194 and 12131222203.

It is a congruent number.

It is an unprimeable number.

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, 433257923 + ... + 433257950.

It is an arithmetic number, because the mean of its divisors is an integer number (2599547622).

Almost surely, 2^12131222222 is an apocalyptic number.

12131222222 is a deficient number, since it is larger than the sum of its proper divisors (8665158754).

12131222222 is an equidigital number, since it uses as much as digits as its factorization.

12131222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866515882.

The product of its digits is 384, while the sum is 20.

Adding to 12131222222 its reverse (22222213121), we get a palindrome (34353435343).

The spelling of 12131222222 in words is "twelve billion, one hundred thirty-one million, two hundred twenty-two thousand, two hundred twenty-two".