2121202111112 has 128 divisors (see below), whose sum is σ = 4965027840000. Its totient is φ = 829657382400.

The previous prime is 2121202111111. The next prime is 2121202111159. The reversal of 2121202111112 is 2111112021212.

It is not an unprimeable number, because it can be changed into a prime (2121202111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2460764 + ... + 3209012.

It is an arithmetic number, because the mean of its divisors is an integer number (38789280000).

Almost surely, 2^{2121202111112} 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 2121202111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482513920000).

2121202111112 is an abundant number, since it is smaller than the sum of its proper divisors (2843825728888).

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

2121202111112 is a wasteful number, since it uses less digits than its factorization.

2121202111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748387 (or 748383 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2121202111112 its reverse (2111112021212), we get a palindrome (4232314132324).

It can be divided in two parts, 212120 and 2111112, that added together give a palindrome (2323232).

The spelling of 2121202111112 in words is "two trillion, one hundred twenty-one billion, two hundred two million, one hundred eleven thousand, one hundred twelve".