218135011 has 2 divisors, whose sum is σ = 218135012. Its totient is φ = 218135010.

The previous prime is 218134999. The next prime is 218135033. The reversal of 218135011 is 110531812.

It is an a-pointer prime, because the next prime (218135033) can be obtained adding 218135011 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218135011 - 2¹¹ = 218132963 is a prime.

It is not a weakly prime, because it can be changed into another prime (218135081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109067505 + 109067506.

It is an arithmetic number, because the mean of its divisors is an integer number (109067506).

Almost surely, 2^218135011 is an apocalyptic number.

218135011 is a deficient number, since it is larger than the sum of its proper divisors (1).

218135011 is an equidigital number, since it uses as much as digits as its factorization.

218135011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 218135011 is about 14769.3944019381. The cubic root of 218135011 is about 601.9703842636.

Adding to 218135011 its reverse (110531812), we get a palindrome (328666823).

The spelling of 218135011 in words is "two hundred eighteen million, one hundred thirty-five thousand, eleven".