320212321 has 8 divisors (see below), whose sum is σ = 376193664. Its totient is φ = 268709520.

The previous prime is 320212309. The next prime is 320212367. The reversal of 320212321 is 123212023.

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

It is a cyclic number.

It is not a de Polignac number, because 320212321 - 2⁹ = 320211809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320212295 and 320212304.

It is not an unprimeable number, because it can be changed into a prime (320212381) 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, 1119481 + ... + 1119766.

It is an arithmetic number, because the mean of its divisors is an integer number (47024208).

Almost surely, 2^320212321 is an apocalyptic number.

It is an amenable number.

320212321 is a deficient number, since it is larger than the sum of its proper divisors (55981343).

320212321 is a wasteful number, since it uses less digits than its factorization.

320212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239271.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 320212321 is about 17894.4773882894. The cubic root of 320212321 is about 684.1416218101.

Adding to 320212321 its reverse (123212023), we get a palindrome (443424344).

The spelling of 320212321 in words is "three hundred twenty million, two hundred twelve thousand, three hundred twenty-one".