11421218 has 8 divisors (see below), whose sum is σ = 17149440. Its totient is φ = 5704740.

The previous prime is 11421211. The next prime is 11421233. The reversal of 11421218 is 81212411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11421218.

It is not an unprimeable number, because it can be changed into a prime (11421211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 4781.

It is an arithmetic number, because the mean of its divisors is an integer number (2143680).

Almost surely, 2^11421218 is an apocalyptic number.

11421218 is a deficient number, since it is larger than the sum of its proper divisors (5728222).

11421218 is a wasteful number, since it uses less digits than its factorization.

11421218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872.

The product of its digits is 128, while the sum is 20.

The square root of 11421218 is about 3379.5292571599. The cubic root of 11421218 is about 225.2012553208.

Adding to 11421218 its reverse (81212411), we get a palindrome (92633629).

The spelling of 11421218 in words is "eleven million, four hundred twenty-one thousand, two hundred eighteen".