111312321 has 8 divisors (see below), whose sum is σ = 148866144. Its totient is φ = 73983360.

The previous prime is 111312307. The next prime is 111312361. The reversal of 111312321 is 123213111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111312321 - 2⁷ = 111312193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111312321.

It is not an unprimeable number, because it can be changed into a prime (111312301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55056 + ... + 57041.

It is an arithmetic number, because the mean of its divisors is an integer number (18608268).

Almost surely, 2^111312321 is an apocalyptic number.

It is an amenable number.

111312321 is a deficient number, since it is larger than the sum of its proper divisors (37553823).

111312321 is a wasteful number, since it uses less digits than its factorization.

111312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112431.

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

The square root of 111312321 is about 10550.4654399699. The cubic root of 111312321 is about 481.0398766507.

Adding to 111312321 its reverse (123213111), we get a palindrome (234525432).

The spelling of 111312321 in words is "one hundred eleven million, three hundred twelve thousand, three hundred twenty-one".