21300413171 has 2 divisors, whose sum is σ = 21300413172. Its totient is φ = 21300413170.

The previous prime is 21300413159. The next prime is 21300413231. The reversal of 21300413171 is 17131400312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21300413171 is a prime.

It is not a weakly prime, because it can be changed into another prime (21300413371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650206585 + 10650206586.

It is an arithmetic number, because the mean of its divisors is an integer number (10650206586).

Almost surely, 2^21300413171 is an apocalyptic number.

21300413171 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300413171 is an equidigital number, since it uses as much as digits as its factorization.

21300413171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21300413171 its reverse (17131400312), we get a palindrome (38431813483).

The spelling of 21300413171 in words is "twenty-one billion, three hundred million, four hundred thirteen thousand, one hundred seventy-one".