20124111303217 has 2 divisors, whose sum is σ = 20124111303218. Its totient is φ = 20124111303216.

The previous prime is 20124111303173. The next prime is 20124111303269. The reversal of 20124111303217 is 71230311142102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19479520700721 + 644590602496 = 4413561^2 + 802864^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124111303217 - 2¹¹ = 20124111301169 is a prime.

It is a super-2 number, since 2×20124111303217² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20124111303277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062055651608 + 10062055651609.

It is an arithmetic number, because the mean of its divisors is an integer number (10062055651609).

Almost surely, 2^{20124111303217} is an apocalyptic number.

It is an amenable number.

20124111303217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124111303217 is an equidigital number, since it uses as much as digits as its factorization.

20124111303217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 20124111303217 its reverse (71230311142102), we get a palindrome (91354422445319).

The spelling of 20124111303217 in words is "twenty trillion, one hundred twenty-four billion, one hundred eleven million, three hundred three thousand, two hundred seventeen".