11218401 has 6 divisors (see below), whose sum is σ = 16204370. Its totient is φ = 7478928.

The previous prime is 11218397. The next prime is 11218433. The reversal of 11218401 is 10481211.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 720801 = 3240^2 + 849^2 .

It is not a de Polignac number, because 11218401 - 2² = 11218397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11218601) 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 in 5 ways as a sum of consecutive naturals, for example, 623236 + ... + 623253.

Almost surely, 2^11218401 is an apocalyptic number.

It is an amenable number.

11218401 is a deficient number, since it is larger than the sum of its proper divisors (4985969).

11218401 is a wasteful number, since it uses less digits than its factorization.

11218401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246495 (or 1246492 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 11218401 is about 3349.3881530811. The cubic root of 11218401 is about 223.8602511077.

Adding to 11218401 its reverse (10481211), we get a palindrome (21699612).

The spelling of 11218401 in words is "eleven million, two hundred eighteen thousand, four hundred one".