204203110221 has 24 divisors (see below), whose sum is σ = 323824142304. Its totient is φ = 122971174560.

The previous prime is 204203110213. The next prime is 204203110253. The reversal of 204203110221 is 122011302402.

It is a happy number.

204203110221 is a `hidden beast` number, since 20 + 420 + 3 + 1 + 1 + 0 + 221 = 666.

It is not a de Polignac number, because 204203110221 - 2³ = 204203110213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204203110194 and 204203110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204203110201) 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, 6553431 + ... + 6584516.

It is an arithmetic number, because the mean of its divisors is an integer number (13492672596).

Almost surely, 2^204203110221 is an apocalyptic number.

It is an amenable number.

204203110221 is a deficient number, since it is larger than the sum of its proper divisors (119621032083).

204203110221 is a wasteful number, since it uses less digits than its factorization.

204203110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13138121 (or 13138118 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 204203110221 its reverse (122011302402), we get a palindrome (326214412623).

The spelling of 204203110221 in words is "two hundred four billion, two hundred three million, one hundred ten thousand, two hundred twenty-one".