100721207 has 8 divisors (see below), whose sum is σ = 102076800. Its totient is φ = 99374904.

The previous prime is 100721191. The next prime is 100721213. The reversal of 100721207 is 702127001.

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 100721207 - 2⁴ = 100721191 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 (100721237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21044 + ... + 25382.

It is an arithmetic number, because the mean of its divisors is an integer number (12759600).

Almost surely, 2^100721207 is an apocalyptic number.

100721207 is a deficient number, since it is larger than the sum of its proper divisors (1355593).

100721207 is a wasteful number, since it uses less digits than its factorization.

100721207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 100721207 is about 10035.9955659616. The cubic root of 100721207 is about 465.2720603174.

Adding to 100721207 its reverse (702127001), we get a palindrome (802848208).

The spelling of 100721207 in words is "one hundred million, seven hundred twenty-one thousand, two hundred seven".