2111112021 has 16 divisors (see below), whose sum is σ = 2968145600. Its totient is φ = 1331002368.

The previous prime is 2111112007. The next prime is 2111112079. The reversal of 2111112021 is 1202111112.

It is not a de Polignac number, because 2111112021 - 2¹⁵ = 2111079253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111111988 and 2111112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111112001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 64983.

It is an arithmetic number, because the mean of its divisors is an integer number (185509100).

Almost surely, 2^2111112021 is an apocalyptic number.

It is an amenable number.

2111112021 is a deficient number, since it is larger than the sum of its proper divisors (857033579).

2111112021 is a wasteful number, since it uses less digits than its factorization.

2111112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64788.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2111112021 is about 45946.8390751747. The cubic root of 2111112021 is about 1282.8338947260.

Adding to 2111112021 its reverse (1202111112), we get a palindrome (3313223133).

Subtracting from 2111112021 its reverse (1202111112), we obtain a palindrome (909000909).

The spelling of 2111112021 in words is "two billion, one hundred eleven million, one hundred twelve thousand, twenty-one".