2143775160721 has 4 divisors (see below), whose sum is σ = 2145216840192. Its totient is φ = 2142333481252.

The previous prime is 2143775160719. The next prime is 2143775160743. The reversal of 2143775160721 is 1270615773412.

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.

It is a cyclic number.

It is not a de Polignac number, because 2143775160721 - 2¹ = 2143775160719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143775169721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720837505 + ... + 720840478.

It is an arithmetic number, because the mean of its divisors is an integer number (536304210048).

Almost surely, 2^{2143775160721} is an apocalyptic number.

It is an amenable number.

2143775160721 is a deficient number, since it is larger than the sum of its proper divisors (1441679471).

2143775160721 is a wasteful number, since it uses less digits than its factorization.

2143775160721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441679470.

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 2143775160721 in words is "two trillion, one hundred forty-three billion, seven hundred seventy-five million, one hundred sixty thousand, seven hundred twenty-one".