12218700 has 108 divisors (see below), whose sum is σ = 38440248. Its totient is φ = 2995200.

The previous prime is 12218663. The next prime is 12218707. The reversal of 12218700 is 781221.

12218700 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218707) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50580 + ... + 50820.

Almost surely, 2^12218700 is an apocalyptic number.

12218700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12218700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19220124).

12218700 is an abundant number, since it is smaller than the sum of its proper divisors (26221548).

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

12218700 is a wasteful number, since it uses less digits than its factorization.

12218700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 12218700 is about 3495.5257115347. The cubic root of 12218700 is about 230.3253115597.

Adding to 12218700 its reverse (781221), we get a palindrome (12999921).

It can be divided in two parts, 12 and 218700, that multiplied together give a square (2624400 = 1620²).

The spelling of 12218700 in words is "twelve million, two hundred eighteen thousand, seven hundred".