204431322121321 has 8 divisors (see below), whose sum is σ = 205522898437800. Its totient is φ = 203340079276032.

The previous prime is 204431322121261. The next prime is 204431322121333. The reversal of 204431322121321 is 123121223134402.

It can be written as a sum of positive squares in 4 ways, for example, as 9006691243225 + 195424630878096 = 3001115^2 + 13979436^2 .

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 204431322121321 - 2²⁵ = 204431288566889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204431322121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82138396 + ... + 84590653.

It is an arithmetic number, because the mean of its divisors is an integer number (25690362304725).

Almost surely, 2^{204431322121321} is an apocalyptic number.

It is an amenable number.

204431322121321 is a deficient number, since it is larger than the sum of its proper divisors (1091576316479).

204431322121321 is a wasteful number, since it uses less digits than its factorization.

204431322121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166735595.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 204431322121321 its reverse (123121223134402), we get a palindrome (327552545255723).

The spelling of 204431322121321 in words is "two hundred four trillion, four hundred thirty-one billion, three hundred twenty-two million, one hundred twenty-one thousand, three hundred twenty-one".