8021111 has 4 divisors (see below), whose sum is σ = 9166992. Its totient is φ = 6875232.

The previous prime is 8021099. The next prime is 8021113. The reversal of 8021111 is 1111208.

8021111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8021111 - 2⁶ = 8021047 is a prime.

It is a Duffinian number.

8021111 is a modest number, since divided by 1111 gives 802 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572930 + ... + 572943.

It is an arithmetic number, because the mean of its divisors is an integer number (2291748).

Almost surely, 2^8021111 is an apocalyptic number.

8021111 is a deficient number, since it is larger than the sum of its proper divisors (1145881).

8021111 is a wasteful number, since it uses less digits than its factorization.

8021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145880.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 8021111 is about 2832.1565987777. The cubic root of 8021111 is about 200.1757704784.

Adding to 8021111 its reverse (1111208), we get a palindrome (9132319).

Subtracting from 8021111 its reverse (1111208), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8021111 in words is "eight million, twenty-one thousand, one hundred eleven".