2104403221 has 4 divisors (see below), whose sum is σ = 2106948672. Its totient is φ = 2101857772.

The previous prime is 2104403219. The next prime is 2104403227. The reversal of 2104403221 is 1223044012.

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 2104403221 - 2¹ = 2104403219 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 (2104403227) 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, 1271485 + ... + 1273138.

It is an arithmetic number, because the mean of its divisors is an integer number (526737168).

Almost surely, 2^2104403221 is an apocalyptic number.

It is an amenable number.

2104403221 is a deficient number, since it is larger than the sum of its proper divisors (2545451).

2104403221 is an equidigital number, since it uses as much as digits as its factorization.

2104403221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545450.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2104403221 is about 45873.7748719244. The cubic root of 2104403221 is about 1281.4735676307.

Adding to 2104403221 its reverse (1223044012), we get a palindrome (3327447233).

The spelling of 2104403221 in words is "two billion, one hundred four million, four hundred three thousand, two hundred twenty-one".