2143331321 has 4 divisors (see below), whose sum is σ = 2269409652. Its totient is φ = 2017252992.

The previous prime is 2143331299. The next prime is 2143331329. The reversal of 2143331321 is 1231333412.

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 1834837225 + 308494096 = 42835^2 + 17564^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143331321 - 2⁶ = 2143331257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143331329) 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, 63039140 + ... + 63039173.

It is an arithmetic number, because the mean of its divisors is an integer number (567352413).

Almost surely, 2^2143331321 is an apocalyptic number.

It is an amenable number.

2143331321 is a deficient number, since it is larger than the sum of its proper divisors (126078331).

2143331321 is a wasteful number, since it uses less digits than its factorization.

2143331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126078330.

The product of its digits is 1296, while the sum is 23.

The square root of 2143331321 is about 46296.1264146365. The cubic root of 2143331321 is about 1289.3270774739.

Adding to 2143331321 its reverse (1231333412), we get a palindrome (3374664733).

The spelling of 2143331321 in words is "two billion, one hundred forty-three million, three hundred thirty-one thousand, three hundred twenty-one".