204213321 has 24 divisors (see below), whose sum is σ = 325060736. Its totient is φ = 122744160.

The previous prime is 204213313. The next prime is 204213329. The reversal of 204213321 is 123312402.

It is an interprime number because it is at equal distance from previous prime (204213313) and next prime (204213329).

It is not a de Polignac number, because 204213321 - 2³ = 204213313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204213294 and 204213303.

It is not an unprimeable number, because it can be changed into a prime (204213329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15265 + ... + 25326.

Almost surely, 2^204213321 is an apocalyptic number.

It is an amenable number.

204213321 is a deficient number, since it is larger than the sum of its proper divisors (120847415).

204213321 is a wasteful number, since it uses less digits than its factorization.

204213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40653 (or 40650 counting only the distinct ones).

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

The square root of 204213321 is about 14290.3226345664. The cubic root of 204213321 is about 588.8816514926.

Adding to 204213321 its reverse (123312402), we get a palindrome (327525723).

The spelling of 204213321 in words is "two hundred four million, two hundred thirteen thousand, three hundred twenty-one".