11123231137 has 2 divisors, whose sum is σ = 11123231138. Its totient is φ = 11123231136.

The previous prime is 11123231083. The next prime is 11123231173. The reversal of 11123231137 is 73113232111.

Together with next prime (11123231173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10451177361 + 672053776 = 102231^2 + 25924^2 .

It is an emirp because it is prime and its reverse (73113232111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11123231137 - 2¹⁵ = 11123198369 is a prime.

It is not a weakly prime, because it can be changed into another prime (11123201137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561615568 + 5561615569.

It is an arithmetic number, because the mean of its divisors is an integer number (5561615569).

Almost surely, 2^11123231137 is an apocalyptic number.

It is an amenable number.

11123231137 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123231137 is an equidigital number, since it uses as much as digits as its factorization.

11123231137 is an evil number, because the sum of its binary digits is even.

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

Adding to 11123231137 its reverse (73113232111), we get a palindrome (84236463248).

The spelling of 11123231137 in words is "eleven billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-seven".