11131223237 has 2 divisors, whose sum is σ = 11131223238. Its totient is φ = 11131223236.

The previous prime is 11131223171. The next prime is 11131223249. The reversal of 11131223237 is 73232213111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10443000481 + 688222756 = 102191^2 + 26234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131223237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11131223137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565611618 + 5565611619.

It is an arithmetic number, because the mean of its divisors is an integer number (5565611619).

Almost surely, 2^11131223237 is an apocalyptic number.

It is an amenable number.

11131223237 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131223237 is an equidigital number, since it uses as much as digits as its factorization.

11131223237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

Adding to 11131223237 its reverse (73232213111), we get a palindrome (84363436348).

The spelling of 11131223237 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-seven".