13121218 has 8 divisors (see below), whose sum is σ = 21471120. Its totient is φ = 5964180.

The previous prime is 13121209. The next prime is 13121219. The reversal of 13121218 is 81212131.

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

It is a junction number, because it is equal to n+sod(n) for n = 13121195 and 13121204.

It is not an unprimeable number, because it can be changed into a prime (13121219) 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, 298188 + ... + 298231.

It is an arithmetic number, because the mean of its divisors is an integer number (2683890).

Almost surely, 2^13121218 is an apocalyptic number.

13121218 is a deficient number, since it is larger than the sum of its proper divisors (8349902).

13121218 is a wasteful number, since it uses less digits than its factorization.

13121218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596432.

The product of its digits is 96, while the sum is 19.

The square root of 13121218 is about 3622.3221833514. The cubic root of 13121218 is about 235.8620399267.

Adding to 13121218 its reverse (81212131), we get a palindrome (94333349).

The spelling of 13121218 in words is "thirteen million, one hundred twenty-one thousand, two hundred eighteen".