2102011111 has 8 divisors (see below), whose sum is σ = 2143025424. Its totient is φ = 2061047040.

The previous prime is 2102011103. The next prime is 2102011133. The reversal of 2102011111 is 1111102012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2102011111 - 2³ = 2102011103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102011151) 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 7 ways as a sum of consecutive naturals, for example, 78256 + ... + 101626.

It is an arithmetic number, because the mean of its divisors is an integer number (267878178).

Almost surely, 2^2102011111 is an apocalyptic number.

2102011111 is a deficient number, since it is larger than the sum of its proper divisors (41014313).

2102011111 is a wasteful number, since it uses less digits than its factorization.

2102011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25121.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2102011111 is about 45847.6947184916. The cubic root of 2102011111 is about 1280.9878261235.

Adding to 2102011111 its reverse (1111102012), we get a palindrome (3213113123).

Subtracting from 2102011111 its reverse (1111102012), we obtain a palindrome (990909099).

It can be divided in two parts, 21020 and 11111, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 2102011111 in words is "two billion, one hundred two million, eleven thousand, one hundred eleven".