2121021110112 has 24 divisors (see below), whose sum is σ = 5567680414296. Its totient is φ = 707007036672.

The previous prime is 2121021110099. The next prime is 2121021110129. The reversal of 2121021110112 is 2110111201212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 2121021110091 and 2121021110100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11046984853 + ... + 11046985044.

It is an arithmetic number, because the mean of its divisors is an integer number (231986683929).

Almost surely, 2^{2121021110112} is an apocalyptic number.

It is an amenable number.

2121021110112 is an abundant number, since it is smaller than the sum of its proper divisors (3446659304184).

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

2121021110112 is a wasteful number, since it uses less digits than its factorization.

2121021110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22093969910 (or 22093969902 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2121021110112 its reverse (2110111201212), we get a palindrome (4231132311324).

The spelling of 2121021110112 in words is "two trillion, one hundred twenty-one billion, twenty-one million, one hundred ten thousand, one hundred twelve".