243121367072171 has 32 divisors (see below), whose sum is σ = 282851774565888. Its totient is φ = 204651632989440.

The previous prime is 243121367072123. The next prime is 243121367072201. The reversal of 243121367072171 is 171270763121342.

It is a de Polignac number, because none of the positive numbers 2^k-243121367072171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121367072071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 735133376 + ... + 735464018.

It is an arithmetic number, because the mean of its divisors is an integer number (8839117955184).

Almost surely, 2^{243121367072171} is an apocalyptic number.

243121367072171 is a deficient number, since it is larger than the sum of its proper divisors (39730407493717).

243121367072171 is a wasteful number, since it uses less digits than its factorization.

243121367072171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333411.

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 243121367072171 in words is "two hundred forty-three trillion, one hundred twenty-one billion, three hundred sixty-seven million, seventy-two thousand, one hundred seventy-one".