21410117 has 2 divisors, whose sum is σ = 21410118. Its totient is φ = 21410116.

The previous prime is 21410113. The next prime is 21410141. The reversal of 21410117 is 71101412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13293316 + 8116801 = 3646^2 + 2849^2 .

It is a cyclic number.

It is not a de Polignac number, because 21410117 - 2² = 21410113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21410095 and 21410104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21410111) 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 as a sum of consecutive naturals, namely, 10705058 + 10705059.

It is an arithmetic number, because the mean of its divisors is an integer number (10705059).

Almost surely, 2^21410117 is an apocalyptic number.

It is an amenable number.

21410117 is a deficient number, since it is larger than the sum of its proper divisors (1).

21410117 is an equidigital number, since it uses as much as digits as its factorization.

21410117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 21410117 is about 4627.1067634106. The cubic root of 21410117 is about 277.6768539614.

Adding to 21410117 its reverse (71101412), we get a palindrome (92511529).

The spelling of 21410117 in words is "twenty-one million, four hundred ten thousand, one hundred seventeen".