101218 has 16 divisors (see below), whose sum is σ = 173880. Its totient is φ = 43776.

The previous prime is 101209. The next prime is 101221. The reversal of 101218 is 812101.

It can be written as a sum of positive squares in 4 ways, for example, as 97969 + 3249 = 313^2 + 57^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 101198 and 101207.

It is an unprimeable number.

101218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 556.

2¹⁰¹²¹⁸ is an apocalyptic number.

101218 is a deficient number, since it is larger than the sum of its proper divisors (72662).

101218 is a wasteful number, since it uses less digits than its factorization.

101218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 101218 is about 318.1477644114. The cubic root of 101218 is about 46.6035768774.

Adding to 101218 its reverse (812101), we get a palindrome (913319).

The spelling of 101218 in words is "one hundred one thousand, two hundred eighteen".