2121331424 has 48 divisors (see below), whose sum is σ = 4211953200. Its totient is φ = 1051674624.

The previous prime is 2121331393. The next prime is 2121331447. The reversal of 2121331424 is 4241331212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121331424.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2469107 + ... + 2469965.

It is an arithmetic number, because the mean of its divisors is an integer number (87749025).

Almost surely, 2^2121331424 is an apocalyptic number.

It is an amenable number.

2121331424 is a deficient number, since it is larger than the sum of its proper divisors (2090621776).

2121331424 is a wasteful number, since it uses less digits than its factorization.

2121331424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1427 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 2121331424 is about 46057.9138042530. The cubic root of 2121331424 is about 1284.9005305877.

Adding to 2121331424 its reverse (4241331212), we get a palindrome (6362662636).

The spelling of 2121331424 in words is "two billion, one hundred twenty-one million, three hundred thirty-one thousand, four hundred twenty-four".