2121021202112 has 84 divisors (see below), whose sum is σ = 4443136662096. Its totient is φ = 1004455641600.

The previous prime is 2121021202063. The next prime is 2121021202177. The reversal of 2121021202112 is 2112021201212.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131707853 + ... + 131723955.

Almost surely, 2^{2121021202112} 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 2121021202112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221568331048).

2121021202112 is an abundant number, since it is smaller than the sum of its proper divisors (2322115459984).

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

2121021202112 is a wasteful number, since it uses less digits than its factorization.

2121021202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21854 (or 21825 counting only the distinct ones).

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

Adding to 2121021202112 its reverse (2112021201212), we get a palindrome (4233042403324).

The spelling of 2121021202112 in words is "two trillion, one hundred twenty-one billion, twenty-one million, two hundred two thousand, one hundred twelve".