2121044430 has 32 divisors (see below), whose sum is σ = 5113350144. Its totient is φ = 563073696.

The previous prime is 2121044363. The next prime is 2121044447. The reversal of 2121044430 is 344401212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121044397 and 2121044406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151834 + ... + 165213.

It is an arithmetic number, because the mean of its divisors is an integer number (159792192).

Almost surely, 2^2121044430 is an apocalyptic number.

2121044430 is an abundant number, since it is smaller than the sum of its proper divisors (2992305714).

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

2121044430 is a wasteful number, since it uses less digits than its factorization.

2121044430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317280.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2121044430 is about 46054.7981213684. The cubic root of 2121044430 is about 1284.8425834309.

Adding to 2121044430 its reverse (344401212), we get a palindrome (2465445642).

The spelling of 2121044430 in words is "two billion, one hundred twenty-one million, forty-four thousand, four hundred thirty".