11123131237 has 2 divisors, whose sum is σ = 11123131238. Its totient is φ = 11123131236.

The previous prime is 11123131219. The next prime is 11123131277. The reversal of 11123131237 is 73213132111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10743115201 + 380016036 = 103649^2 + 19494^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123131237 - 2²³ = 11114742629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123131277) by changing a digit.

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, 5561565618 + 5561565619.

It is an arithmetic number, because the mean of its divisors is an integer number (5561565619).

Almost surely, 2^11123131237 is an apocalyptic number.

It is an amenable number.

11123131237 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123131237 is an equidigital number, since it uses as much as digits as its factorization.

11123131237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

Adding to 11123131237 its reverse (73213132111), we get a palindrome (84336263348).

The spelling of 11123131237 in words is "eleven billion, one hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-seven".