12218899 has 16 divisors (see below), whose sum is σ = 15413760. Its totient is φ = 9408960.

The previous prime is 12218897. The next prime is 12218933. The reversal of 12218899 is 99881221.

12218899 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12218899 - 2¹ = 12218897 is a prime.

It is a Duffinian number.

12218899 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12218891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5962 + ... + 7744.

It is an arithmetic number, because the mean of its divisors is an integer number (963360).

Almost surely, 2^12218899 is an apocalyptic number.

12218899 is a deficient number, since it is larger than the sum of its proper divisors (3194861).

12218899 is a wasteful number, since it uses less digits than its factorization.

12218899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890.

The product of its digits is 20736, while the sum is 40.

The square root of 12218899 is about 3495.5541763789. The cubic root of 12218899 is about 230.3265619515.

The spelling of 12218899 in words is "twelve million, two hundred eighteen thousand, eight hundred ninety-nine".