4221111 has 4 divisors (see below), whose sum is σ = 5628152. Its totient is φ = 2814072.

The previous prime is 4221109. The next prime is 4221169. The reversal of 4221111 is 1111224.

It is a happy number.

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

It is not a de Polignac number, because 4221111 - 2¹ = 4221109 is a prime.

It is a D-number.

It is a Duffinian number.

4221111 is a modest number, since divided by 1111 gives 422 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221011) 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, 703516 + ... + 703521.

It is an arithmetic number, because the mean of its divisors is an integer number (1407038).

Almost surely, 2^4221111 is an apocalyptic number.

4221111 is a deficient number, since it is larger than the sum of its proper divisors (1407041).

4221111 is a wasteful number, since it uses less digits than its factorization.

4221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407040.

The product of its digits is 16, while the sum is 12.

The square root of 4221111 is about 2054.5342537909. The cubic root of 4221111 is about 161.6127390662.

Adding to 4221111 its reverse (1111224), we get a palindrome (5332335).

The spelling of 4221111 in words is "four million, two hundred twenty-one thousand, one hundred eleven".