2104345321 has 4 divisors (see below), whose sum is σ = 2266218052. Its totient is φ = 1942472592.

The previous prime is 2104345307. The next prime is 2104345339. The reversal of 2104345321 is 1235434012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120890025 + 1983455296 = 10995^2 + 44536^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104345321 - 2¹⁹ = 2103821033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104345351) 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, 80936346 + ... + 80936371.

It is an arithmetic number, because the mean of its divisors is an integer number (566554513).

Almost surely, 2^2104345321 is an apocalyptic number.

It is an amenable number.

2104345321 is a deficient number, since it is larger than the sum of its proper divisors (161872731).

2104345321 is a wasteful number, since it uses less digits than its factorization.

2104345321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161872730.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2104345321 is about 45873.1437880597. The cubic root of 2104345321 is about 1281.4618148133.

Adding to 2104345321 its reverse (1235434012), we get a palindrome (3339779333).

The spelling of 2104345321 in words is "two billion, one hundred four million, three hundred forty-five thousand, three hundred twenty-one".