204220011 has 4 divisors (see below), whose sum is σ = 272293352. Its totient is φ = 136146672.

The previous prime is 204220007. The next prime is 204220019. The reversal of 204220011 is 110022402.

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

It is not a de Polignac number, because 204220011 - 2² = 204220007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204220019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34036666 + ... + 34036671.

It is an arithmetic number, because the mean of its divisors is an integer number (68073338).

Almost surely, 2^204220011 is an apocalyptic number.

204220011 is a deficient number, since it is larger than the sum of its proper divisors (68073341).

204220011 is an equidigital number, since it uses as much as digits as its factorization.

204220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68073340.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 204220011 is about 14290.5567071406. The cubic root of 204220011 is about 588.8880819827. Note that the first 3 decimals are identical.

Adding to 204220011 its reverse (110022402), we get a palindrome (314242413).

The spelling of 204220011 in words is "two hundred four million, two hundred twenty thousand, eleven".