12122817 has 32 divisors (see below), whose sum is σ = 20305920. Its totient is φ = 6272640.

The previous prime is 12122813. The next prime is 12122821. The reversal of 12122817 is 71822121.

12122817 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12122813) and next prime (12122821).

It is not a de Polignac number, because 12122817 - 2² = 12122813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8517 + ... + 9837.

It is an arithmetic number, because the mean of its divisors is an integer number (634560).

Almost surely, 2^12122817 is an apocalyptic number.

It is an amenable number.

12122817 is a deficient number, since it is larger than the sum of its proper divisors (8183103).

12122817 is a wasteful number, since it uses less digits than its factorization.

12122817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373.

The product of its digits is 448, while the sum is 24.

The square root of 12122817 is about 3481.7835946538. The cubic root of 12122817 is about 229.7212565223.

Adding to 12122817 its reverse (71822121), we get a palindrome (83944938).

The spelling of 12122817 in words is "twelve million, one hundred twenty-two thousand, eight hundred seventeen".