231112321 has 16 divisors (see below), whose sum is σ = 255595968. Its totient is φ = 207230400.

The previous prime is 231112319. The next prime is 231112361. The reversal of 231112321 is 123211132.

It is a cyclic number.

It is not a de Polignac number, because 231112321 - 2¹ = 231112319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231112295 and 231112304.

It is not an unprimeable number, because it can be changed into a prime (231112361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281091 + ... + 281911.

It is an arithmetic number, because the mean of its divisors is an integer number (15974748).

Almost surely, 2^231112321 is an apocalyptic number.

It is an amenable number.

231112321 is a deficient number, since it is larger than the sum of its proper divisors (24483647).

231112321 is a wasteful number, since it uses less digits than its factorization.

231112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its digits is 72, while the sum is 16.

The square root of 231112321 is about 15202.3787941230. The cubic root of 231112321 is about 613.6786763863.

Adding to 231112321 its reverse (123211132), we get a palindrome (354323453).

The spelling of 231112321 in words is "two hundred thirty-one million, one hundred twelve thousand, three hundred twenty-one".