2121044416 has 56 divisors (see below), whose sum is σ = 4280855040. Its totient is φ = 1042536192.

The previous prime is 2121044363. The next prime is 2121044447. The reversal of 2121044416 is 6144401212.

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, 1204945 + ... + 1206703.

It is an arithmetic number, because the mean of its divisors is an integer number (76443840).

Almost surely, 2^2121044416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121044416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140427520).

2121044416 is an abundant number, since it is smaller than the sum of its proper divisors (2159810624).

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

2121044416 is a wasteful number, since it uses less digits than its factorization.

2121044416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2071 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2121044416 is about 46054.7979693756. The cubic root of 2121044416 is about 1284.8425806040.

Adding to 2121044416 its reverse (6144401212), we get a palindrome (8265445628).

The spelling of 2121044416 in words is "two billion, one hundred twenty-one million, forty-four thousand, four hundred sixteen".