404303004221 has 4 divisors (see below), whose sum is σ = 413705399712. Its totient is φ = 394900608732.

The previous prime is 404303004167. The next prime is 404303004223. The reversal of 404303004221 is 122400303404.

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-404303004221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404303004223) 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, 4701197681 + ... + 4701197766.

It is an arithmetic number, because the mean of its divisors is an integer number (103426349928).

Almost surely, 2^404303004221 is an apocalyptic number.

It is an amenable number.

404303004221 is a deficient number, since it is larger than the sum of its proper divisors (9402395491).

404303004221 is an equidigital number, since it uses as much as digits as its factorization.

404303004221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9402395490.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 404303004221 its reverse (122400303404), we get a palindrome (526703307625).

The spelling of 404303004221 in words is "four hundred four billion, three hundred three million, four thousand, two hundred twenty-one".