2121011011112 has 64 divisors (see below), whose sum is σ = 4702192560000. Its totient is φ = 877576847616.

The previous prime is 2121011011109. The next prime is 2121011011129. The reversal of 2121011011112 is 2111101101212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18943358 + ... + 19054994.

It is an arithmetic number, because the mean of its divisors is an integer number (73471758750).

Almost surely, 2^{2121011011112} is an apocalyptic number.

It is an amenable number.

2121011011112 is an abundant number, since it is smaller than the sum of its proper divisors (2581181548888).

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

2121011011112 is a wasteful number, since it uses less digits than its factorization.

2121011011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123378 (or 123374 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2121011011112 its reverse (2111101101212), we get a palindrome (4232112112324).

The spelling of 2121011011112 in words is "two trillion, one hundred twenty-one billion, eleven million, eleven thousand, one hundred twelve".