16218101 has 2 divisors, whose sum is σ = 16218102. Its totient is φ = 16218100.

The previous prime is 16218091. The next prime is 16218107. The reversal of 16218101 is 10181261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10719076 + 5499025 = 3274^2 + 2345^2 .

It is an emirp because it is prime and its reverse (10181261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16218101 - 2¹⁸ = 15955957 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16218107) 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, 8109050 + 8109051.

It is an arithmetic number, because the mean of its divisors is an integer number (8109051).

Almost surely, 2^16218101 is an apocalyptic number.

It is an amenable number.

16218101 is a deficient number, since it is larger than the sum of its proper divisors (1).

16218101 is an equidigital number, since it uses as much as digits as its factorization.

16218101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 16218101 is about 4027.1703465337. The cubic root of 16218101 is about 253.1240050969.

Adding to 16218101 its reverse (10181261), we get a palindrome (26399362).

The spelling of 16218101 in words is "sixteen million, two hundred eighteen thousand, one hundred one".