204121240321 has 8 divisors (see below), whose sum is σ = 207987059880. Its totient is φ = 200255956992.

The previous prime is 204121240319. The next prime is 204121240331. The reversal of 204121240321 is 123042121402.

It can be written as a sum of positive squares in 4 ways, for example, as 1134948721 + 202986291600 = 33689^2 + 450540^2 .

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 204121240321 - 2¹ = 204121240319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204121240292 and 204121240301.

It is not an unprimeable number, because it can be changed into a prime (204121240331) 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, 680935 + ... + 933763.

It is an arithmetic number, because the mean of its divisors is an integer number (25998382485).

Almost surely, 2^204121240321 is an apocalyptic number.

It is an amenable number.

204121240321 is a deficient number, since it is larger than the sum of its proper divisors (3865819559).

204121240321 is a wasteful number, since it uses less digits than its factorization.

204121240321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268115.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 204121240321 its reverse (123042121402), we get a palindrome (327163361723).

The spelling of 204121240321 in words is "two hundred four billion, one hundred twenty-one million, two hundred forty thousand, three hundred twenty-one".