2144221111 has 4 divisors (see below), whose sum is σ = 2218159800. Its totient is φ = 2070282424.

The previous prime is 2144221109. The next prime is 2144221133. The reversal of 2144221111 is 1111224412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2144221111 - 2¹ = 2144221109 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 (2144221141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36969301 + ... + 36969358.

It is an arithmetic number, because the mean of its divisors is an integer number (554539950).

Almost surely, 2^2144221111 is an apocalyptic number.

2144221111 is a deficient number, since it is larger than the sum of its proper divisors (73938689).

2144221111 is an equidigital number, since it uses as much as digits as its factorization.

2144221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73938688.

The product of its digits is 128, while the sum is 19.

The square root of 2144221111 is about 46305.7351847479. The cubic root of 2144221111 is about 1289.5054713617.

Adding to 2144221111 its reverse (1111224412), we get a palindrome (3255445523).

The spelling of 2144221111 in words is "two billion, one hundred forty-four million, two hundred twenty-one thousand, one hundred eleven".