2144020321 has 4 divisors (see below), whose sum is σ = 2144114352. Its totient is φ = 2143926292.

The previous prime is 2144020309. The next prime is 2144020369. The reversal of 2144020321 is 1230204412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2144020321 - 2¹⁵ = 2143987553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144020381) 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 3 ways as a sum of consecutive naturals, for example, 11286 + ... + 66448.

It is an arithmetic number, because the mean of its divisors is an integer number (536028588).

Almost surely, 2^2144020321 is an apocalyptic number.

It is an amenable number.

2144020321 is a deficient number, since it is larger than the sum of its proper divisors (94031).

2144020321 is an equidigital number, since it uses as much as digits as its factorization.

2144020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94030.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2144020321 is about 46303.5670440194. The cubic root of 2144020321 is about 1289.4652193118.

Adding to 2144020321 its reverse (1230204412), we get a palindrome (3374224733).

The spelling of 2144020321 in words is "two billion, one hundred forty-four million, twenty thousand, three hundred twenty-one".