101173721 has 8 divisors (see below), whose sum is σ = 114177600. Its totient is φ = 88804240.

The previous prime is 101173717. The next prime is 101173753. The reversal of 101173721 is 127371101.

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 101173721 - 2² = 101173717 is a prime.

It is a super-2 number, since 2×101173721² = 20472243641971682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101173771) 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, 158261 + ... + 158898.

It is an arithmetic number, because the mean of its divisors is an integer number (14272200).

Almost surely, 2^101173721 is an apocalyptic number.

101173721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101173721 is a deficient number, since it is larger than the sum of its proper divisors (13003879).

101173721 is a wasteful number, since it uses less digits than its factorization.

101173721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317199.

The product of its (nonzero) digits is 294, while the sum is 23.

The square root of 101173721 is about 10058.5148506129. The cubic root of 101173721 is about 465.9678012591.

The spelling of 101173721 in words is "one hundred one million, one hundred seventy-three thousand, seven hundred twenty-one".