204040204101221 has 8 divisors (see below), whose sum is σ = 204384645226944. Its totient is φ = 203695829688960.

The previous prime is 204040204101203. The next prime is 204040204101301. The reversal of 204040204101221 is 122101402040402.

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 204040204101221 - 2⁶ = 204040204101157 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 (204040204109221) 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, 10554395 + ... + 22792008.

It is an arithmetic number, because the mean of its divisors is an integer number (25548080653368).

Almost surely, 2^{204040204101221} is an apocalyptic number.

It is an amenable number.

204040204101221 is a deficient number, since it is larger than the sum of its proper divisors (344441125723).

204040204101221 is an equidigital number, since it uses as much as digits as its factorization.

204040204101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33356731.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 204040204101221 its reverse (122101402040402), we get a palindrome (326141606141623).

The spelling of 204040204101221 in words is "two hundred four trillion, forty billion, two hundred four million, one hundred one thousand, two hundred twenty-one".