211240223309 has 2 divisors, whose sum is σ = 211240223310. Its totient is φ = 211240223308.

The previous prime is 211240223303. The next prime is 211240223321. The reversal of 211240223309 is 903322042112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210690180100 + 550043209 = 459010^2 + 23453^2 .

It is a cyclic number.

It is not a de Polignac number, because 211240223309 - 2¹⁶ = 211240157773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211240223303) 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, 105620111654 + 105620111655.

It is an arithmetic number, because the mean of its divisors is an integer number (105620111655).

Almost surely, 2^211240223309 is an apocalyptic number.

It is an amenable number.

211240223309 is a deficient number, since it is larger than the sum of its proper divisors (1).

211240223309 is an equidigital number, since it uses as much as digits as its factorization.

211240223309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 211240223309 in words is "two hundred eleven billion, two hundred forty million, two hundred twenty-three thousand, three hundred nine".