204421301421 has 8 divisors (see below), whose sum is σ = 273531706944. Its totient is φ = 135795881760.

The previous prime is 204421301393. The next prime is 204421301489. The reversal of 204421301421 is 124103124402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204421301421 - 2²² = 204417107117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204421301391 and 204421301400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204421301521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121245481 + ... + 121247166.

It is an arithmetic number, because the mean of its divisors is an integer number (34191463368).

Almost surely, 2^204421301421 is an apocalyptic number.

It is an amenable number.

204421301421 is a deficient number, since it is larger than the sum of its proper divisors (69110405523).

204421301421 is a wasteful number, since it uses less digits than its factorization.

204421301421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242492931.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 204421301421 its reverse (124103124402), we get a palindrome (328524425823).

The spelling of 204421301421 in words is "two hundred four billion, four hundred twenty-one million, three hundred one thousand, four hundred twenty-one".