2121043424 has 12 divisors (see below), whose sum is σ = 4175804304. Its totient is φ = 1060521696.

The previous prime is 2121043423. The next prime is 2121043427. The reversal of 2121043424 is 4243401212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121043424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121043423) 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 as a sum of consecutive naturals, namely, 33141272 + ... + 33141335.

It is an arithmetic number, because the mean of its divisors is an integer number (347983692).

Almost surely, 2^2121043424 is an apocalyptic number.

It is an amenable number.

2121043424 is a deficient number, since it is larger than the sum of its proper divisors (2054760880).

2121043424 is an equidigital number, since it uses as much as digits as its factorization.

2121043424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66282617 (or 66282609 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2121043424 is about 46054.7871995952. The cubic root of 2121043424 is about 1284.8423802996.

Adding to 2121043424 its reverse (4243401212), we get a palindrome (6364444636).

The spelling of 2121043424 in words is "two billion, one hundred twenty-one million, forty-three thousand, four hundred twenty-four".