204033312323221 has 4 divisors (see below), whose sum is σ = 204036849161100. Its totient is φ = 204029775485344.

The previous prime is 204033312323161. The next prime is 204033312323237. The reversal of 204033312323221 is 122323213330402.

204033312323221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17886555562500 + 186146756760721 = 4229250^2 + 13643561^2 .

It is a cyclic number.

It is not a de Polignac number, because 204033312323221 - 2¹⁹ = 204033311798933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204033312323251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1768332406 + ... + 1768447783.

It is an arithmetic number, because the mean of its divisors is an integer number (51009212290275).

Almost surely, 2^{204033312323221} is an apocalyptic number.

It is an amenable number.

204033312323221 is a deficient number, since it is larger than the sum of its proper divisors (3536837879).

204033312323221 is an equidigital number, since it uses as much as digits as its factorization.

204033312323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536837878.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 204033312323221 its reverse (122323213330402), we get a palindrome (326356525653623).

The spelling of 204033312323221 in words is "two hundred four trillion, thirty-three billion, three hundred twelve million, three hundred twenty-three thousand, two hundred twenty-one".