201124122217 has 2 divisors, whose sum is σ = 201124122218. Its totient is φ = 201124122216.

The previous prime is 201124122203. The next prime is 201124122229. The reversal of 201124122217 is 712221421102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135868908816 + 65255213401 = 368604^2 + 255451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201124122217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201124122191 and 201124122200.

It is not a weakly prime, because it can be changed into another prime (201124122317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100562061108 + 100562061109.

It is an arithmetic number, because the mean of its divisors is an integer number (100562061109).

Almost surely, 2^201124122217 is an apocalyptic number.

It is an amenable number.

201124122217 is a deficient number, since it is larger than the sum of its proper divisors (1).

201124122217 is an equidigital number, since it uses as much as digits as its factorization.

201124122217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 201124122217 its reverse (712221421102), we get a palindrome (913345543319).

The spelling of 201124122217 in words is "two hundred one billion, one hundred twenty-four million, one hundred twenty-two thousand, two hundred seventeen".