2868170256121 has 4 divisors (see below), whose sum is σ = 2870395370100. Its totient is φ = 2865945142144.

The previous prime is 2868170256113. The next prime is 2868170256137. The reversal of 2868170256121 is 1216520718682.

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 1266075040000 + 1602095216121 = 1125200^2 + 1265739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2868170256121 - 2³ = 2868170256113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2868170256101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112555056 + ... + 1112557633.

It is an arithmetic number, because the mean of its divisors is an integer number (717598842525).

Almost surely, 2^{2868170256121} is an apocalyptic number.

It is an amenable number.

2868170256121 is a deficient number, since it is larger than the sum of its proper divisors (2225113979).

2868170256121 is a wasteful number, since it uses less digits than its factorization.

2868170256121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225113978.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 2868170256121 in words is "two trillion, eight hundred sixty-eight billion, one hundred seventy million, two hundred fifty-six thousand, one hundred twenty-one".