404104323230021 has 4 divisors (see below), whose sum is σ = 412702287554112. Its totient is φ = 395506358905932.

The previous prime is 404104323229951. The next prime is 404104323230033. The reversal of 404104323230021 is 120032323401404.

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 a de Polignac number, because none of the positive numbers 2^k-404104323230021 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 (404104323230821) 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, 4298982161975 + ... + 4298982162068.

It is an arithmetic number, because the mean of its divisors is an integer number (103175571888528).

Almost surely, 2^{404104323230021} is an apocalyptic number.

It is an amenable number.

404104323230021 is a deficient number, since it is larger than the sum of its proper divisors (8597964324091).

404104323230021 is an equidigital number, since it uses as much as digits as its factorization.

404104323230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8597964324090.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 404104323230021 its reverse (120032323401404), we get a palindrome (524136646631425).

The spelling of 404104323230021 in words is "four hundred four trillion, one hundred four billion, three hundred twenty-three million, two hundred thirty thousand, twenty-one".