2144444221321 has 4 divisors (see below), whose sum is σ = 2144702689812. Its totient is φ = 2144185752832.

The previous prime is 2144444221261. The next prime is 2144444221331. The reversal of 2144444221321 is 1231224444412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2035815312400 + 108628908921 = 1426820^2 + 329589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144444221321 - 2⁷ = 2144444221193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144444221331) 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, 129221800 + ... + 129238393.

It is an arithmetic number, because the mean of its divisors is an integer number (536175672453).

Almost surely, 2^{2144444221321} is an apocalyptic number.

It is an amenable number.

2144444221321 is a deficient number, since it is larger than the sum of its proper divisors (258468491).

2144444221321 is an equidigital number, since it uses as much as digits as its factorization.

2144444221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258468490.

The product of its digits is 49152, while the sum is 34.

Adding to 2144444221321 its reverse (1231224444412), we get a palindrome (3375668665733).

The spelling of 2144444221321 in words is "two trillion, one hundred forty-four billion, four hundred forty-four million, two hundred twenty-one thousand, three hundred twenty-one".