231122321 has 8 divisors (see below), whose sum is σ = 235046400. Its totient is φ = 227223360.

The previous prime is 231122303. The next prime is 231122323. The reversal of 231122321 is 123221132.

231122321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231122321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231122321.

It is not an unprimeable number, because it can be changed into a prime (231122323) 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, 12761 + ... + 25001.

It is an arithmetic number, because the mean of its divisors is an integer number (29380800).

Almost surely, 2^231122321 is an apocalyptic number.

It is an amenable number.

231122321 is a deficient number, since it is larger than the sum of its proper divisors (3924079).

231122321 is a wasteful number, since it uses less digits than its factorization.

231122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12559.

The product of its digits is 144, while the sum is 17.

The square root of 231122321 is about 15202.7076864616. The cubic root of 231122321 is about 613.6875273470.

Adding to 231122321 its reverse (123221132), we get a palindrome (354343453).

The spelling of 231122321 in words is "two hundred thirty-one million, one hundred twenty-two thousand, three hundred twenty-one".