211242440789 has 2 divisors, whose sum is σ = 211242440790. Its totient is φ = 211242440788.

The previous prime is 211242440753. The next prime is 211242440791. The reversal of 211242440789 is 987044242112.

211242440789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127461138289 + 83781302500 = 357017^2 + 289450^2 .

It is a cyclic number.

It is not a de Polignac number, because 211242440789 - 2¹² = 211242436693 is a prime.

Together with 211242440791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211242445789) 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, 105621220394 + 105621220395.

It is an arithmetic number, because the mean of its divisors is an integer number (105621220395).

Almost surely, 2^211242440789 is an apocalyptic number.

It is an amenable number.

211242440789 is a deficient number, since it is larger than the sum of its proper divisors (1).

211242440789 is an equidigital number, since it uses as much as digits as its factorization.

211242440789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 211242440789 in words is "two hundred eleven billion, two hundred forty-two million, four hundred forty thousand, seven hundred eighty-nine".