2144123321 has 8 divisors (see below), whose sum is σ = 2185746120. Its totient is φ = 2102543872.

The previous prime is 2144123287. The next prime is 2144123329. The reversal of 2144123321 is 1233214412.

It can be written as a sum of positive squares in 4 ways, for example, as 509134096 + 1634989225 = 22564^2 + 40435^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144123321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2144123329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99881 + ... + 119433.

It is an arithmetic number, because the mean of its divisors is an integer number (273218265).

Almost surely, 2^2144123321 is an apocalyptic number.

It is an amenable number.

2144123321 is a deficient number, since it is larger than the sum of its proper divisors (41622799).

2144123321 is a wasteful number, since it uses less digits than its factorization.

2144123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21675.

The product of its digits is 1152, while the sum is 23.

The square root of 2144123321 is about 46304.6792559888. The cubic root of 2144123321 is about 1289.4858678709.

Adding to 2144123321 its reverse (1233214412), we get a palindrome (3377337733).

The spelling of 2144123321 in words is "two billion, one hundred forty-four million, one hundred twenty-three thousand, three hundred twenty-one".