12311323237 has 2 divisors, whose sum is σ = 12311323238. Its totient is φ = 12311323236.

The previous prime is 12311323217. The next prime is 12311323243. The reversal of 12311323237 is 73232311321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9170169121 + 3141154116 = 95761^2 + 56046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12311323237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311323207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155661618 + 6155661619.

It is an arithmetic number, because the mean of its divisors is an integer number (6155661619).

Almost surely, 2^12311323237 is an apocalyptic number.

It is an amenable number.

12311323237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311323237 is an equidigital number, since it uses as much as digits as its factorization.

12311323237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 28.

Adding to 12311323237 its reverse (73232311321), we get a palindrome (85543634558).

The spelling of 12311323237 in words is "twelve billion, three hundred eleven million, three hundred twenty-three thousand, two hundred thirty-seven".