100216601 has 4 divisors (see below), whose sum is σ = 100736052. Its totient is φ = 99697152.

The previous prime is 100216591. The next prime is 100216603. The reversal of 100216601 is 106612001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9985600 + 90231001 = 3160^2 + 9499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100216601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100216601.

It is not an unprimeable number, because it can be changed into a prime (100216603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259436 + ... + 259821.

It is an arithmetic number, because the mean of its divisors is an integer number (25184013).

Almost surely, 2^100216601 is an apocalyptic number.

It is an amenable number.

100216601 is a deficient number, since it is larger than the sum of its proper divisors (519451).

100216601 is an equidigital number, since it uses as much as digits as its factorization.

100216601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519450.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 100216601 is about 10010.8241918435. The cubic root of 100216601 is about 464.4937659522.

Adding to 100216601 its reverse (106612001), we get a palindrome (206828602).

The spelling of 100216601 in words is "one hundred million, two hundred sixteen thousand, six hundred one".