218220867001 has 2 divisors, whose sum is σ = 218220867002. Its totient is φ = 218220867000.

The previous prime is 218220866999. The next prime is 218220867023. The reversal of 218220867001 is 100768022812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161042492601 + 57178374400 = 401301^2 + 239120^2 .

It is a cyclic number.

It is not a de Polignac number, because 218220867001 - 2¹ = 218220866999 is a prime.

Together with 218220866999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (218220867061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109110433500 + 109110433501.

It is an arithmetic number, because the mean of its divisors is an integer number (109110433501).

Almost surely, 2^218220867001 is an apocalyptic number.

It is an amenable number.

218220867001 is a deficient number, since it is larger than the sum of its proper divisors (1).

218220867001 is an equidigital number, since it uses as much as digits as its factorization.

218220867001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

Adding to 218220867001 its reverse (100768022812), we get a palindrome (318988889813).

The spelling of 218220867001 in words is "two hundred eighteen billion, two hundred twenty million, eight hundred sixty-seven thousand, one".