204022244021 has 4 divisors (see below), whose sum is σ = 204023851200. Its totient is φ = 204020636844.

The previous prime is 204022243961. The next prime is 204022244057. The reversal of 204022244021 is 120442220402.

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 204022244021 - 2²² = 204018049717 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 (204022244521) 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, 595151 + ... + 873068.

It is an arithmetic number, because the mean of its divisors is an integer number (51005962800).

Almost surely, 2^204022244021 is an apocalyptic number.

It is an amenable number.

204022244021 is a deficient number, since it is larger than the sum of its proper divisors (1607179).

204022244021 is a wasteful number, since it uses less digits than its factorization.

204022244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607178.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 204022244021 its reverse (120442220402), we get a palindrome (324464464423).

The spelling of 204022244021 in words is "two hundred four billion, twenty-two million, two hundred forty-four thousand, twenty-one".