2144420221 has 8 divisors (see below), whose sum is σ = 2157410304. Its totient is φ = 2131448880.

The previous prime is 2144420197. The next prime is 2144420263. The reversal of 2144420221 is 1220244412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2144420221 - 2⁷ = 2144420093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2144420192 and 2144420201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144420021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273660 + ... + 281386.

It is an arithmetic number, because the mean of its divisors is an integer number (269676288).

Almost surely, 2^2144420221 is an apocalyptic number.

It is an amenable number.

2144420221 is a deficient number, since it is larger than the sum of its proper divisors (12990083).

2144420221 is a wasteful number, since it uses less digits than its factorization.

2144420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9371.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 2144420221 is about 46307.8850845080. The cubic root of 2144420221 is about 1289.5453841435.

Adding to 2144420221 its reverse (1220244412), we get a palindrome (3364664633).

The spelling of 2144420221 in words is "two billion, one hundred forty-four million, four hundred twenty thousand, two hundred twenty-one".