2101243217 has 2 divisors, whose sum is σ = 2101243218. Its totient is φ = 2101243216.

The previous prime is 2101243201. The next prime is 2101243229. The reversal of 2101243217 is 7123421012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1975713601 + 125529616 = 44449^2 + 11204^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101243217 - 2⁴ = 2101243201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101243192 and 2101243201.

It is not a weakly prime, because it can be changed into another prime (2101243267) 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, 1050621608 + 1050621609.

It is an arithmetic number, because the mean of its divisors is an integer number (1050621609).

Almost surely, 2^2101243217 is an apocalyptic number.

It is an amenable number.

2101243217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101243217 is an equidigital number, since it uses as much as digits as its factorization.

2101243217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2101243217 is about 45839.3195521050. The cubic root of 2101243217 is about 1280.8318195470.

Adding to 2101243217 its reverse (7123421012), we get a palindrome (9224664229).

The spelling of 2101243217 in words is "two billion, one hundred one million, two hundred forty-three thousand, two hundred seventeen".