321231121 has 4 divisors (see below), whose sum is σ = 321768000. Its totient is φ = 320694244.

The previous prime is 321231103. The next prime is 321231137. The reversal of 321231121 is 121132123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321231121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321231095 and 321231104.

It is not an unprimeable number, because it can be changed into a prime (321231181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267541 + ... + 268738.

It is an arithmetic number, because the mean of its divisors is an integer number (80442000).

Almost surely, 2^321231121 is an apocalyptic number.

It is an amenable number.

321231121 is a deficient number, since it is larger than the sum of its proper divisors (536879).

321231121 is an equidigital number, since it uses as much as digits as its factorization.

321231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536878.

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

The square root of 321231121 is about 17922.9216647287. The cubic root of 321231121 is about 684.8664175555.

Adding to 321231121 its reverse (121132123), we get a palindrome (442363244).

The spelling of 321231121 in words is "three hundred twenty-one million, two hundred thirty-one thousand, one hundred twenty-one".