2121001111112 has 16 divisors (see below), whose sum is σ = 4282790705340. Its totient is φ = 978923589696.

The previous prime is 2121001111109. The next prime is 2121001111133. The reversal of 2121001111112 is 2111111001212.

It can be written as a sum of positive squares in 2 ways, for example, as 1760095742596 + 360905368516 = 1326686^2 + 600754^2 .

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, 10197120623 + ... + 10197120830.

Almost surely, 2^{2121001111112} is an apocalyptic number.

It is an amenable number.

2121001111112 is an abundant number, since it is smaller than the sum of its proper divisors (2161789594228).

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

2121001111112 is a wasteful number, since it uses less digits than its factorization.

2121001111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20394241472 (or 20394241468 counting only the distinct ones).

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

Adding to 2121001111112 its reverse (2111111001212), we get a palindrome (4232112112324).

The spelling of 2121001111112 in words is "two trillion, one hundred twenty-one billion, one million, one hundred eleven thousand, one hundred twelve".