204102004421 has 12 divisors (see below), whose sum is σ = 249920822880. Its totient is φ = 165736965240.

The previous prime is 204102004417. The next prime is 204102004451. The reversal of 204102004421 is 124400201402.

It is not a de Polignac number, because 204102004421 - 2² = 204102004417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204102004393 and 204102004402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204102004451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109613465 + ... + 109615326.

It is an arithmetic number, because the mean of its divisors is an integer number (20826735240).

Almost surely, 2^204102004421 is an apocalyptic number.

It is an amenable number.

204102004421 is a deficient number, since it is larger than the sum of its proper divisors (45818818459).

204102004421 is a wasteful number, since it uses less digits than its factorization.

204102004421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219228824 (or 219228817 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 204102004421 its reverse (124400201402), we get a palindrome (328502205823).

The spelling of 204102004421 in words is "two hundred four billion, one hundred two million, four thousand, four hundred twenty-one".