2121005244 has 24 divisors (see below), whose sum is σ = 5108658688. Its totient is φ = 684195120.

The previous prime is 2121005239. The next prime is 2121005269. The reversal of 2121005244 is 4425001212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121005244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2850442 + ... + 2851185.

Almost surely, 2^2121005244 is an apocalyptic number.

It is an amenable number.

2121005244 is an abundant number, since it is smaller than the sum of its proper divisors (2987653444).

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

2121005244 is a wasteful number, since it uses less digits than its factorization.

2121005244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5701665 (or 5701663 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2121005244 is about 46054.3726914177. The cubic root of 2121005244 is about 1284.8346709530.

Adding to 2121005244 its reverse (4425001212), we get a palindrome (6546006456).

The spelling of 2121005244 in words is "two billion, one hundred twenty-one million, five thousand, two hundred forty-four".