321342021 has 96 divisors (see below), whose sum is σ = 635910912. Its totient is φ = 150958080.

The previous prime is 321342017. The next prime is 321342037. The reversal of 321342021 is 120243123.

321342021 is a `hidden beast` number, since 321 + 342 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 321342021 - 2² = 321342017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321341985 and 321342003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321342061) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 477141 + ... + 477813.

It is an arithmetic number, because the mean of its divisors is an integer number (6624072).

Almost surely, 2^321342021 is an apocalyptic number.

It is an amenable number.

321342021 is a deficient number, since it is larger than the sum of its proper divisors (314568891).

321342021 is a wasteful number, since it uses less digits than its factorization.

321342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 321342021 is about 17926.0152013770. The cubic root of 321342021 is about 684.9452216128.

Adding to 321342021 its reverse (120243123), we get a palindrome (441585144).

The spelling of 321342021 in words is "three hundred twenty-one million, three hundred forty-two thousand, twenty-one".