2104320221 has 4 divisors (see below), whose sum is σ = 2104527744. Its totient is φ = 2104112700.

The previous prime is 2104320217. The next prime is 2104320247. The reversal of 2104320221 is 1220234012.

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 2104320221 - 2² = 2104320217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2104320221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104320271) 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, 87725 + ... + 109106.

It is an arithmetic number, because the mean of its divisors is an integer number (526131936).

Almost surely, 2^2104320221 is an apocalyptic number.

It is an amenable number.

2104320221 is a deficient number, since it is larger than the sum of its proper divisors (207523).

2104320221 is a wasteful number, since it uses less digits than its factorization.

2104320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207522.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2104320221 is about 45872.8702066919. The cubic root of 2104320221 is about 1281.4567198290.

Adding to 2104320221 its reverse (1220234012), we get a palindrome (3324554233).

The spelling of 2104320221 in words is "two billion, one hundred four million, three hundred twenty thousand, two hundred twenty-one".