12216770 has 32 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 4696960.

The previous prime is 12216767. The next prime is 12216781. The reversal of 12216770 is 7761221.

12216770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33851 + ... + 34209.

It is an arithmetic number, because the mean of its divisors is an integer number (714420).

Almost surely, 2^12216770 is an apocalyptic number.

12216770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12216770 is a deficient number, since it is larger than the sum of its proper divisors (10644670).

12216770 is a wasteful number, since it uses less digits than its factorization.

12216770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 12216770 is about 3495.2496334311. The cubic root of 12216770 is about 230.3131839395.

Adding to 12216770 its reverse (7761221), we get a palindrome (19977991).

The spelling of 12216770 in words is "twelve million, two hundred sixteen thousand, seven hundred seventy".