321312105 has 48 divisors (see below), whose sum is σ = 566931456. Its totient is φ = 168324480.

The previous prime is 321312091. The next prime is 321312113. The reversal of 321312105 is 501213123.

It is not a de Polignac number, because 321312105 - 2⁹ = 321311593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 838744 + ... + 839126.

It is an arithmetic number, because the mean of its divisors is an integer number (11811072).

Almost surely, 2^321312105 is an apocalyptic number.

It is an amenable number.

321312105 is a deficient number, since it is larger than the sum of its proper divisors (245619351).

321312105 is a wasteful number, since it uses less digits than its factorization.

321312105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 321312105 is about 17925.1807522267. The cubic root of 321312105 is about 684.9239654892.

Adding to 321312105 its reverse (501213123), we get a palindrome (822525228).

The spelling of 321312105 in words is "three hundred twenty-one million, three hundred twelve thousand, one hundred five".