8221111 has 2 divisors, whose sum is σ = 8221112. Its totient is φ = 8221110.

The previous prime is 8221069. The next prime is 8221139. The reversal of 8221111 is 1111228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8221111 - 2¹⁹ = 7696823 is a prime.

8221111 is a modest number, since divided by 1111 gives 822 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8221211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110555 + 4110556.

It is an arithmetic number, because the mean of its divisors is an integer number (4110556).

Almost surely, 2^8221111 is an apocalyptic number.

8221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221111 is an equidigital number, since it uses as much as digits as its factorization.

8221111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 16.

The square root of 8221111 is about 2867.2479836945. The cubic root of 8221111 is about 201.8258718998.

Adding to 8221111 its reverse (1111228), we get a palindrome (9332339).

The spelling of 8221111 in words is "eight million, two hundred twenty-one thousand, one hundred eleven".