11985101 has 2 divisors, whose sum is σ = 11985102. Its totient is φ = 11985100.

The previous prime is 11985073. The next prime is 11985109. The reversal of 11985101 is 10158911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10569001 + 1416100 = 3251^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 11985101 - 2⁶ = 11985037 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11985109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5992550 + 5992551.

It is an arithmetic number, because the mean of its divisors is an integer number (5992551).

Almost surely, 2^11985101 is an apocalyptic number.

It is an amenable number.

11985101 is a deficient number, since it is larger than the sum of its proper divisors (1).

11985101 is an equidigital number, since it uses as much as digits as its factorization.

11985101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 26.

The square root of 11985101 is about 3461.9504618062. The cubic root of 11985101 is about 228.8480587284.

The spelling of 11985101 in words is "eleven million, nine hundred eighty-five thousand, one hundred one".