211423043017 has 2 divisors, whose sum is σ = 211423043018. Its totient is φ = 211423043016.

The previous prime is 211423043003. The next prime is 211423043021. The reversal of 211423043017 is 710340324112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186074900496 + 25348142521 = 431364^2 + 159211^2 .

It is a cyclic number.

It is not a de Polignac number, because 211423043017 - 2³¹ = 209275559369 is a prime.

It is not a weakly prime, because it can be changed into another prime (211423043317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105711521508 + 105711521509.

It is an arithmetic number, because the mean of its divisors is an integer number (105711521509).

Almost surely, 2^211423043017 is an apocalyptic number.

It is an amenable number.

211423043017 is a deficient number, since it is larger than the sum of its proper divisors (1).

211423043017 is an equidigital number, since it uses as much as digits as its factorization.

211423043017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 211423043017 its reverse (710340324112), we get a palindrome (921763367129).

The spelling of 211423043017 in words is "two hundred eleven billion, four hundred twenty-three million, forty-three thousand, seventeen".