2104165321 has 24 divisors (see below), whose sum is σ = 2228688000. Its totient is φ = 1985788224.

The previous prime is 2104165309. The next prime is 2104165333. The reversal of 2104165321 is 1235614012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2104165309) and next prime (2104165333).

It is not a de Polignac number, because 2104165321 - 2⁹ = 2104164809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104160321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8803920 + ... + 8804158.

It is an arithmetic number, because the mean of its divisors is an integer number (92862000).

Almost surely, 2^2104165321 is an apocalyptic number.

It is an amenable number.

2104165321 is a deficient number, since it is larger than the sum of its proper divisors (124522679).

2104165321 is a wasteful number, since it uses less digits than its factorization.

2104165321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2104165321 is about 45871.1818138578. The cubic root of 2104165321 is about 1281.4252761804.

Adding to 2104165321 its reverse (1235614012), we get a palindrome (3339779333).

The spelling of 2104165321 in words is "two billion, one hundred four million, one hundred sixty-five thousand, three hundred twenty-one".