12131332237 has 2 divisors, whose sum is σ = 12131332238. Its totient is φ = 12131332236.

The previous prime is 12131332219. The next prime is 12131332247. The reversal of 12131332237 is 73223313121.

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., 11687555881 + 443776356 = 108109^2 + 21066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131332237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12131332217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065666118 + 6065666119.

It is an arithmetic number, because the mean of its divisors is an integer number (6065666119).

Almost surely, 2^12131332237 is an apocalyptic number.

It is an amenable number.

12131332237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131332237 is an equidigital number, since it uses as much as digits as its factorization.

12131332237 is an evil number, because the sum of its binary digits is even.

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

Adding to 12131332237 its reverse (73223313121), we get a palindrome (85354645358).

The spelling of 12131332237 in words is "twelve billion, one hundred thirty-one million, three hundred thirty-two thousand, two hundred thirty-seven".