9721755101 has 8 divisors (see below), whose sum is σ = 9892970208. Its totient is φ = 9552010000.

The previous prime is 9721755083. The next prime is 9721755157. The reversal of 9721755101 is 1015571279.

It is a happy number.

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 9721755101 - 2⁶ = 9721755037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721755181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354155 + ... + 380616.

It is an arithmetic number, because the mean of its divisors is an integer number (1236621276).

Almost surely, 2^9721755101 is an apocalyptic number.

It is an amenable number.

9721755101 is a deficient number, since it is larger than the sum of its proper divisors (171215107).

9721755101 is a wasteful number, since it uses less digits than its factorization.

9721755101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735003.

The product of its (nonzero) digits is 22050, while the sum is 38.

The square root of 9721755101 is about 98598.9609529431. The cubic root of 9721755101 is about 2134.2644257248.

The spelling of 9721755101 in words is "nine billion, seven hundred twenty-one million, seven hundred fifty-five thousand, one hundred one".