2121324004 has 6 divisors (see below), whose sum is σ = 3712317014. Its totient is φ = 1060662000.

The previous prime is 2121324001. The next prime is 2121324131. The reversal of 2121324004 is 4004231212.

It can be written as a sum of positive squares in only one way, i.e., 1791828900 + 329495104 = 42330^2 + 18152^2 .

It is not an unprimeable number, because it can be changed into a prime (2121324001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265165497 + ... + 265165504.

Almost surely, 2^2121324004 is an apocalyptic number.

It is an amenable number.

2121324004 is a deficient number, since it is larger than the sum of its proper divisors (1590993010).

2121324004 is a wasteful number, since it uses less digits than its factorization.

2121324004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530331005 (or 530331003 counting only the distinct ones).

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

The square root of 2121324004 is about 46057.8332534217. The cubic root of 2121324004 is about 1284.8990324762.

Adding to 2121324004 its reverse (4004231212), we get a palindrome (6125555216).

The spelling of 2121324004 in words is "two billion, one hundred twenty-one million, three hundred twenty-four thousand, four".