268205122721 has 8 divisors (see below), whose sum is σ = 272006192640. Its totient is φ = 264407486112.

The previous prime is 268205122673. The next prime is 268205122771. The reversal of 268205122721 is 127221502862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268205122721 - 2³⁴ = 251025253537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268205122771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700781 + ... + 1013658.

It is an arithmetic number, because the mean of its divisors is an integer number (34000774080).

Almost surely, 2^268205122721 is an apocalyptic number.

It is an amenable number.

268205122721 is a deficient number, since it is larger than the sum of its proper divisors (3801069919).

268205122721 is a wasteful number, since it uses less digits than its factorization.

268205122721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716655.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 268205122721 in words is "two hundred sixty-eight billion, two hundred five million, one hundred twenty-two thousand, seven hundred twenty-one".