211168555901 has 2 divisors, whose sum is σ = 211168555902. Its totient is φ = 211168555900.

The previous prime is 211168555891. The next prime is 211168555921. The reversal of 211168555901 is 109555861112.

211168555901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134414623876 + 76753932025 = 366626^2 + 277045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211168555901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211168555921) 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, 105584277950 + 105584277951.

It is an arithmetic number, because the mean of its divisors is an integer number (105584277951).

Almost surely, 2^211168555901 is an apocalyptic number.

It is an amenable number.

211168555901 is a deficient number, since it is larger than the sum of its proper divisors (1).

211168555901 is an equidigital number, since it uses as much as digits as its factorization.

211168555901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 44.

The spelling of 211168555901 in words is "two hundred eleven billion, one hundred sixty-eight million, five hundred fifty-five thousand, nine hundred one".