210968562721 has 8 divisors (see below), whose sum is σ = 243815996160. Its totient is φ = 178798396128.

The previous prime is 210968562713. The next prime is 210968562731. The reversal of 210968562721 is 127265869012.

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 210968562721 - 2³ = 210968562713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210968562731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169316041 + ... + 169317286.

It is an arithmetic number, because the mean of its divisors is an integer number (30476999520).

Almost surely, 2^210968562721 is an apocalyptic number.

It is an amenable number.

210968562721 is a deficient number, since it is larger than the sum of its proper divisors (32847433439).

210968562721 is an equidigital number, since it uses as much as digits as its factorization.

210968562721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338633423.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 210968562721 in words is "two hundred ten billion, nine hundred sixty-eight million, five hundred sixty-two thousand, seven hundred twenty-one".