2221111 has 2 divisors, whose sum is σ = 2221112. Its totient is φ = 2221110.

The previous prime is 2221097. The next prime is 2221127. The reversal of 2221111 is 1111222.

2221111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221111 - 2¹⁵ = 2188343 is a prime.

It is a Chen prime.

2221111 is a modest number, since divided by 1111 gives 222 as remainder.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110555 + 1110556.

It is an arithmetic number, because the mean of its divisors is an integer number (1110556).

2^2221111 is an apocalyptic number.

2221111 is the 667-th centered decagonal number.

2221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221111 is an equidigital number, since it uses as much as digits as its factorization.

2221111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8, while the sum is 10.

The square root of 2221111 is about 1490.3392231301. The cubic root of 2221111 is about 130.4738329728.

Adding to 2221111 its reverse (1111222), we get a palindrome (3332333).

It can be divided in two parts, 22211 and 11, that added together give a palindrome (22222).

The spelling of 2221111 in words is "two million, two hundred twenty-one thousand, one hundred eleven".