111331223137 has 2 divisors, whose sum is σ = 111331223138. Its totient is φ = 111331223136.

The previous prime is 111331223123. The next prime is 111331223141. The reversal of 111331223137 is 731322133111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100689443856 + 10641779281 = 317316^2 + 103159^2 .

It is a cyclic number.

It is not a de Polignac number, because 111331223137 - 2⁷ = 111331223009 is a prime.

It is not a weakly prime, because it can be changed into another prime (111331923137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55665611568 + 55665611569.

It is an arithmetic number, because the mean of its divisors is an integer number (55665611569).

Almost surely, 2^111331223137 is an apocalyptic number.

It is an amenable number.

111331223137 is a deficient number, since it is larger than the sum of its proper divisors (1).

111331223137 is an equidigital number, since it uses as much as digits as its factorization.

111331223137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

Adding to 111331223137 its reverse (731322133111), we get a palindrome (842653356248).

The spelling of 111331223137 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred twenty-three thousand, one hundred thirty-seven".