111323131 has 2 divisors, whose sum is σ = 111323132. Its totient is φ = 111323130.

The previous prime is 111323129. The next prime is 111323137. The reversal of 111323131 is 131323111.

It is a weak prime.

It is an emirp because it is prime and its reverse (131323111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111323131 - 2¹ = 111323129 is a prime.

It is a super-2 number, since 2×111323131² = 24785678991286322, which contains 22 as substring.

Together with 111323129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111323137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55661565 + 55661566.

It is an arithmetic number, because the mean of its divisors is an integer number (55661566).

Almost surely, 2^111323131 is an apocalyptic number.

111323131 is a deficient number, since it is larger than the sum of its proper divisors (1).

111323131 is an equidigital number, since it uses as much as digits as its factorization.

111323131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 16.

The square root of 111323131 is about 10550.9777272061. The cubic root of 111323131 is about 481.0554480708.

Adding to 111323131 its reverse (131323111), we get a palindrome (242646242).

The spelling of 111323131 in words is "one hundred eleven million, three hundred twenty-three thousand, one hundred thirty-one".