111323121 has 64 divisors (see below), whose sum is σ = 191213568. Its totient is φ = 56049408.

The previous prime is 111323099. The next prime is 111323129. The reversal of 111323121 is 121323111.

It is a happy number.

It is not a de Polignac number, because 111323121 - 2⁶ = 111323057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111323121.

It is not an unprimeable number, because it can be changed into a prime (111323129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1040350 + ... + 1040456.

It is an arithmetic number, because the mean of its divisors is an integer number (2987712).

Almost surely, 2^111323121 is an apocalyptic number.

It is an amenable number.

111323121 is a deficient number, since it is larger than the sum of its proper divisors (79890447).

111323121 is a wasteful number, since it uses less digits than its factorization.

111323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its digits is 36, while the sum is 15.

The square root of 111323121 is about 10550.9772533164. The cubic root of 111323121 is about 481.0554336666.

Adding to 111323121 its reverse (121323111), we get a palindrome (232646232).

The spelling of 111323121 in words is "one hundred eleven million, three hundred twenty-three thousand, one hundred twenty-one".