2121044112 has 120 divisors (see below), whose sum is σ = 6487049088. Its totient is φ = 641606400.

The previous prime is 2121044111. The next prime is 2121044141. The reversal of 2121044112 is 2114401212.

2121044112 is a `hidden beast` number, since 2 + 1 + 210 + 441 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2121044111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1489833 + ... + 1491255.

Almost surely, 2^2121044112 is an apocalyptic number.

2121044112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121044112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3243524544).

2121044112 is an abundant number, since it is smaller than the sum of its proper divisors (4366004976).

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

2121044112 is a wasteful number, since it uses less digits than its factorization.

2121044112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2121044112 is about 46054.7946689593. The cubic root of 2121044112 is about 1284.8425192204.

Adding to 2121044112 its reverse (2114401212), we get a palindrome (4235445324).

The spelling of 2121044112 in words is "two billion, one hundred twenty-one million, forty-four thousand, one hundred twelve".