2121323304 has 128 divisors (see below), whose sum is σ = 5822668800. Its totient is φ = 641921280.

The previous prime is 2121323293. The next prime is 2121323363. The reversal of 2121323304 is 4033231212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 905767 + ... + 908105.

It is an arithmetic number, because the mean of its divisors is an integer number (45489600).

Almost surely, 2^2121323304 is an apocalyptic number.

2121323304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121323304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2911334400).

2121323304 is an abundant number, since it is smaller than the sum of its proper divisors (3701345496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121323304 is a wasteful number, since it uses less digits than its factorization.

2121323304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455 (or 2451 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2121323304 is about 46057.8256542794. The cubic root of 2121323304 is about 1284.8988911447.

Adding to 2121323304 its reverse (4033231212), we get a palindrome (6154554516).

The spelling of 2121323304 in words is "two billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred four".