12213078 has 8 divisors (see below), whose sum is σ = 24426168. Its totient is φ = 4071024.

The previous prime is 12213077. The next prime is 12213079. The reversal of 12213078 is 87031221.

It is an interprime number because it is at equal distance from previous prime (12213077) and next prime (12213079).

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

12213078 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213073) 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, 1017751 + ... + 1017762.

It is an arithmetic number, because the mean of its divisors is an integer number (3053271).

Almost surely, 2^12213078 is an apocalyptic number.

12213078 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.

12213078 is a wasteful number, since it uses less digits than its factorization.

12213078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035518.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 12213078 is about 3494.7214481272. The cubic root of 12213078 is about 230.2899808084.

Adding to 12213078 its reverse (87031221), we get a palindrome (99244299).

The spelling of 12213078 in words is "twelve million, two hundred thirteen thousand, seventy-eight".