321312130 has 16 divisors (see below), whose sum is σ = 579635640. Its totient is φ = 128241792.

The previous prime is 321312127. The next prime is 321312143. The reversal of 321312130 is 31213123.

It can be written as a sum of positive squares in 4 ways, for example, as 261760041 + 59552089 = 16179^2 + 7717^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30585 + ... + 39724.

Almost surely, 2^321312130 is an apocalyptic number.

321312130 is a deficient number, since it is larger than the sum of its proper divisors (258323510).

321312130 is a wasteful number, since it uses less digits than its factorization.

321312130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70773.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321312130 is about 17925.1814495698. The cubic root of 321312130 is about 684.9239832529.

Adding to 321312130 its reverse (31213123), we get a palindrome (352525253).

The spelling of 321312130 in words is "three hundred twenty-one million, three hundred twelve thousand, one hundred thirty".