2121023112 has 128 divisors (see below), whose sum is σ = 6020179200. Its totient is φ = 618089472.

The previous prime is 2121023053. The next prime is 2121023119. The reversal of 2121023112 is 2113201212.

It is a junction number, because it is equal to n+sod(n) for n = 2121023091 and 2121023100.

It is not an unprimeable number, because it can be changed into a prime (2121023119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 477333 + ... + 481755.

It is an arithmetic number, because the mean of its divisors is an integer number (47032650).

Almost surely, 2^2121023112 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 2121023112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3010089600).

2121023112 is an abundant number, since it is smaller than the sum of its proper divisors (3899156088).

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

2121023112 is a wasteful number, since it uses less digits than its factorization.

2121023112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527 (or 4523 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2121023112 is about 46054.5666791036. The cubic root of 2121023112 is about 1284.8382788902.

Adding to 2121023112 its reverse (2113201212), we get a palindrome (4234224324).

The spelling of 2121023112 in words is "two billion, one hundred twenty-one million, twenty-three thousand, one hundred twelve".