1004223204521 has 4 divisors (see below), whose sum is σ = 1004979967872. Its totient is φ = 1003466441172.

The previous prime is 1004223204431. The next prime is 1004223204539. The reversal of 1004223204521 is 1254023224001.

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 1004223204521 - 2²² = 1004219010217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1004223204541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378379685 + ... + 378382338.

It is an arithmetic number, because the mean of its divisors is an integer number (251244991968).

Almost surely, 2^{1004223204521} is an apocalyptic number.

It is an amenable number.

1004223204521 is a deficient number, since it is larger than the sum of its proper divisors (756763351).

1004223204521 is an equidigital number, since it uses as much as digits as its factorization.

1004223204521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756763350.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 1004223204521 its reverse (1254023224001), we get a palindrome (2258246428522).

The spelling of 1004223204521 in words is "one trillion, four billion, two hundred twenty-three million, two hundred four thousand, five hundred twenty-one".