207209101217 has 2 divisors, whose sum is σ = 207209101218. Its totient is φ = 207209101216.

The previous prime is 207209101181. The next prime is 207209101243. The reversal of 207209101217 is 712101902702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188845870096 + 18363231121 = 434564^2 + 135511^2 .

It is a cyclic number.

It is not a de Polignac number, because 207209101217 - 2⁸ = 207209100961 is a prime.

It is a super-2 number, since 2×207209101217² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (207209101277) 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, 103604550608 + 103604550609.

It is an arithmetic number, because the mean of its divisors is an integer number (103604550609).

Almost surely, 2^207209101217 is an apocalyptic number.

It is an amenable number.

207209101217 is a deficient number, since it is larger than the sum of its proper divisors (1).

207209101217 is an equidigital number, since it uses as much as digits as its factorization.

207209101217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The spelling of 207209101217 in words is "two hundred seven billion, two hundred nine million, one hundred one thousand, two hundred seventeen".