2143122321 has 16 divisors (see below), whose sum is σ = 2877062400. Its totient is φ = 1418997888.

The previous prime is 2143122307. The next prime is 2143122353. The reversal of 2143122321 is 1232213412.

It is not a de Polignac number, because 2143122321 - 2¹⁹ = 2142598033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2143120321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280885 + ... + 288413.

It is an arithmetic number, because the mean of its divisors is an integer number (179816400).

Almost surely, 2^2143122321 is an apocalyptic number.

It is an amenable number.

2143122321 is a deficient number, since it is larger than the sum of its proper divisors (733940079).

2143122321 is a wasteful number, since it uses less digits than its factorization.

2143122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168.

The product of its digits is 576, while the sum is 21.

The square root of 2143122321 is about 46293.8691513250. The cubic root of 2143122321 is about 1289.2851679294.

Adding to 2143122321 its reverse (1232213412), we get a palindrome (3375335733).

The spelling of 2143122321 in words is "two billion, one hundred forty-three million, one hundred twenty-two thousand, three hundred twenty-one".