100421317 has 2 divisors, whose sum is σ = 100421318. Its totient is φ = 100421316.

The previous prime is 100421303. The next prime is 100421323. The reversal of 100421317 is 713124001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90649441 + 9771876 = 9521^2 + 3126^2 .

It is an emirp because it is prime and its reverse (713124001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100421317 - 2¹¹ = 100419269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100421294 and 100421303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100421357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210658 + 50210659.

It is an arithmetic number, because the mean of its divisors is an integer number (50210659).

Almost surely, 2^100421317 is an apocalyptic number.

It is an amenable number.

100421317 is a deficient number, since it is larger than the sum of its proper divisors (1).

100421317 is an equidigital number, since it uses as much as digits as its factorization.

100421317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 100421317 is about 10021.0437081174. The cubic root of 100421317 is about 464.8098301265.

Adding to 100421317 its reverse (713124001), we get a palindrome (813545318).

The spelling of 100421317 in words is "one hundred million, four hundred twenty-one thousand, three hundred seventeen".