12821118 has 8 divisors (see below), whose sum is σ = 25642248. Its totient is φ = 4273704.

The previous prime is 12821117. The next prime is 12821119. The reversal of 12821118 is 81112821.

It is an interprime number because it is at equal distance from previous prime (12821117) and next prime (12821119).

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

12821118 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821117) 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 3 ways as a sum of consecutive naturals, for example, 1068421 + ... + 1068432.

It is an arithmetic number, because the mean of its divisors is an integer number (3205281).

Almost surely, 2^12821118 is an apocalyptic number.

12821118 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12821118 is a wasteful number, since it uses less digits than its factorization.

12821118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136858.

The product of its digits is 256, while the sum is 24.

The square root of 12821118 is about 3580.6588779162. The cubic root of 12821118 is about 234.0499929711.

Adding to 12821118 its reverse (81112821), we get a palindrome (93933939).

The spelling of 12821118 in words is "twelve million, eight hundred twenty-one thousand, one hundred eighteen".