111331387 has 2 divisors, whose sum is σ = 111331388. Its totient is φ = 111331386.

The previous prime is 111331331. The next prime is 111331397. The reversal of 111331387 is 783133111.

It is a strong prime.

It is an emirp because it is prime and its reverse (783133111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111331387 - 2¹⁵ = 111298619 is a prime.

It is not a weakly prime, because it can be changed into another prime (111331307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55665693 + 55665694.

It is an arithmetic number, because the mean of its divisors is an integer number (55665694).

Almost surely, 2^111331387 is an apocalyptic number.

111331387 is a deficient number, since it is larger than the sum of its proper divisors (1).

111331387 is an equidigital number, since it uses as much as digits as its factorization.

111331387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 111331387 is about 10551.3689633147. The cubic root of 111331387 is about 481.0673398660.

Adding to 111331387 its reverse (783133111), we get a palindrome (894464498).

The spelling of 111331387 in words is "one hundred eleven million, three hundred thirty-one thousand, three hundred eighty-seven".