204030103100221 has 4 divisors (see below), whose sum is σ = 214768529579200. Its totient is φ = 193291676621244.

The previous prime is 204030103100111. The next prime is 204030103100249. The reversal of 204030103100221 is 122001301030402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204030103100221 - 2⁹ = 204030103099709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 10738426478959 = 204030103100221 / (2 + 0 + 4 + 0 + 3 + 0 + 1 + 0 + 3 + 1 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204030103101221) 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, 5369213239461 + ... + 5369213239498.

It is an arithmetic number, because the mean of its divisors is an integer number (53692132394800).

Almost surely, 2^{204030103100221} is an apocalyptic number.

It is an amenable number.

204030103100221 is a deficient number, since it is larger than the sum of its proper divisors (10738426478979).

204030103100221 is a wasteful number, since it uses less digits than its factorization.

204030103100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738426478978.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 204030103100221 its reverse (122001301030402), we get a palindrome (326031404130623).

The spelling of 204030103100221 in words is "two hundred four trillion, thirty billion, one hundred three million, one hundred thousand, two hundred twenty-one".