11218971 has 8 divisors (see below), whose sum is σ = 15073344. Its totient is φ = 7421960.

The previous prime is 11218943. The next prime is 11218981. The reversal of 11218971 is 17981211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11218971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11218981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13881 + ... + 14666.

It is an arithmetic number, because the mean of its divisors is an integer number (1884168).

Almost surely, 2^11218971 is an apocalyptic number.

11218971 is a deficient number, since it is larger than the sum of its proper divisors (3854373).

11218971 is a wasteful number, since it uses less digits than its factorization.

11218971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28681.

The product of its digits is 1008, while the sum is 30.

The square root of 11218971 is about 3349.4732421681. The cubic root of 11218971 is about 223.8640424437.

The spelling of 11218971 in words is "eleven million, two hundred eighteen thousand, nine hundred seventy-one".