68752281221 has 8 divisors (see below), whose sum is σ = 74335905504. Its totient is φ = 63210798000.

The previous prime is 68752281211. The next prime is 68752281259. The reversal of 68752281221 is 12218225786.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68752281221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68752281211) 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, 10531871 + ... + 10538396.

It is an arithmetic number, because the mean of its divisors is an integer number (9291988188).

Almost surely, 2^68752281221 is an apocalyptic number.

It is an amenable number.

68752281221 is a deficient number, since it is larger than the sum of its proper divisors (5583624283).

68752281221 is a wasteful number, since it uses less digits than its factorization.

68752281221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21070531.

The product of its digits is 215040, while the sum is 44.

The spelling of 68752281221 in words is "sixty-eight billion, seven hundred fifty-two million, two hundred eighty-one thousand, two hundred twenty-one".