211301232209 has 2 divisors, whose sum is σ = 211301232210. Its totient is φ = 211301232208.

The previous prime is 211301232187. The next prime is 211301232221. The reversal of 211301232209 is 902232103112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157254281809 + 54046950400 = 396553^2 + 232480^2 .

It is a cyclic number.

It is not a de Polignac number, because 211301232209 - 2¹² = 211301228113 is a prime.

It is not a weakly prime, because it can be changed into another prime (211301232229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105650616104 + 105650616105.

It is an arithmetic number, because the mean of its divisors is an integer number (105650616105).

Almost surely, 2^211301232209 is an apocalyptic number.

It is an amenable number.

211301232209 is a deficient number, since it is larger than the sum of its proper divisors (1).

211301232209 is an equidigital number, since it uses as much as digits as its factorization.

211301232209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 211301232209 in words is "two hundred eleven billion, three hundred one million, two hundred thirty-two thousand, two hundred nine".