2121022120112 has 80 divisors (see below), whose sum is σ = 4832110516800. Its totient is φ = 882965422080.

The previous prime is 2121022120109. The next prime is 2121022120117. The reversal of 2121022120112 is 2110212201212.

It is not an unprimeable number, because it can be changed into a prime (2121022120117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43064 + ... + 2060072.

It is an arithmetic number, because the mean of its divisors is an integer number (60401381460).

Almost surely, 2^{2121022120112} 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 2121022120112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2416055258400).

2121022120112 is an abundant number, since it is smaller than the sum of its proper divisors (2711088396688).

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

2121022120112 is a wasteful number, since it uses less digits than its factorization.

2121022120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017294 (or 2017288 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121022120112 its reverse (2110212201212), we get a palindrome (4231234321324).

The spelling of 2121022120112 in words is "two trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred twelve".