2121104424 has 16 divisors (see below), whose sum is σ = 5302761120. Its totient is φ = 707034800.

The previous prime is 2121104423. The next prime is 2121104431. The reversal of 2121104424 is 4244011212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121104424.

It is not an unprimeable number, because it can be changed into a prime (2121104423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44189652 + ... + 44189699.

It is an arithmetic number, because the mean of its divisors is an integer number (331422570).

Almost surely, 2^2121104424 is an apocalyptic number.

2121104424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2121104424 is an abundant number, since it is smaller than the sum of its proper divisors (3181656696).

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

2121104424 is a wasteful number, since it uses less digits than its factorization.

2121104424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88379360 (or 88379356 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 2121104424 is about 46055.4494495494. The cubic root of 2121104424 is about 1284.8546972930.

Adding to 2121104424 its reverse (4244011212), we get a palindrome (6365115636).

The spelling of 2121104424 in words is "two billion, one hundred twenty-one million, one hundred four thousand, four hundred twenty-four".