211242342979 has 2 divisors, whose sum is σ = 211242342980. Its totient is φ = 211242342978.

The previous prime is 211242342977. The next prime is 211242343001. The reversal of 211242342979 is 979243242112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211242342979 - 2¹ = 211242342977 is a prime.

Together with 211242342977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211242342977) 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, 105621171489 + 105621171490.

It is an arithmetic number, because the mean of its divisors is an integer number (105621171490).

Almost surely, 2^211242342979 is an apocalyptic number.

211242342979 is a deficient number, since it is larger than the sum of its proper divisors (1).

211242342979 is an equidigital number, since it uses as much as digits as its factorization.

211242342979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The spelling of 211242342979 in words is "two hundred eleven billion, two hundred forty-two million, three hundred forty-two thousand, nine hundred seventy-nine".