100012217 has 2 divisors, whose sum is σ = 100012218. Its totient is φ = 100012216.

The previous prime is 100012189. The next prime is 100012223. The reversal of 100012217 is 712210001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73685056 + 26327161 = 8584^2 + 5131^2 .

It is an emirp because it is prime and its reverse (712210001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100012217 - 2⁶ = 100012153 is a prime.

It is not a weakly prime, because it can be changed into another prime (100012247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50006108 + 50006109.

It is an arithmetic number, because the mean of its divisors is an integer number (50006109).

Almost surely, 2^100012217 is an apocalyptic number.

It is an amenable number.

100012217 is a deficient number, since it is larger than the sum of its proper divisors (1).

100012217 is an equidigital number, since it uses as much as digits as its factorization.

100012217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 100012217 is about 10000.6108313443. The cubic root of 100012217 is about 464.1777846885.

Adding to 100012217 its reverse (712210001), we get a palindrome (812222218).

The spelling of 100012217 in words is "one hundred million, twelve thousand, two hundred seventeen".