12311144242 has 4 divisors (see below), whose sum is σ = 18466716366. Its totient is φ = 6155572120.

The previous prime is 12311144239. The next prime is 12311144291. The reversal of 12311144242 is 24244111321.

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

It can be written as a sum of positive squares in only one way, i.e., 10090001601 + 2221142641 = 100449^2 + 47129^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3077786059 + ... + 3077786062.

Almost surely, 2^12311144242 is an apocalyptic number.

12311144242 is a deficient number, since it is larger than the sum of its proper divisors (6155572124).

12311144242 is an equidigital number, since it uses as much as digits as its factorization.

12311144242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6155572123.

The product of its digits is 1536, while the sum is 25.

Adding to 12311144242 its reverse (24244111321), we get a palindrome (36555255563).

The spelling of 12311144242 in words is "twelve billion, three hundred eleven million, one hundred forty-four thousand, two hundred forty-two".