204434234110221 has 4 divisors (see below), whose sum is σ = 272578978813632. Its totient is φ = 136289489406812.

The previous prime is 204434234110193. The next prime is 204434234110277. The reversal of 204434234110221 is 122011432434402.

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 204434234110221 - 2⁹ = 204434234109709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204434234110021) 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, 34072372351701 + ... + 34072372351706.

It is an arithmetic number, because the mean of its divisors is an integer number (68144744703408).

Almost surely, 2^{204434234110221} is an apocalyptic number.

It is an amenable number.

204434234110221 is a deficient number, since it is larger than the sum of its proper divisors (68144744703411).

204434234110221 is an equidigital number, since it uses as much as digits as its factorization.

204434234110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68144744703410.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 204434234110221 its reverse (122011432434402), we get a palindrome (326445666544623).

The spelling of 204434234110221 in words is "two hundred four trillion, four hundred thirty-four billion, two hundred thirty-four million, one hundred ten thousand, two hundred twenty-one".