12121417 has 16 divisors (see below), whose sum is σ = 15249024. Its totient is φ = 9438000.

The previous prime is 12121393. The next prime is 12121423. The reversal of 12121417 is 71412121.

It is not a de Polignac number, because 12121417 - 2¹¹ = 12119369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121394 and 12121403.

It is not an unprimeable number, because it can be changed into a prime (12121427) 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 15 ways as a sum of consecutive naturals, for example, 8667 + ... + 9967.

It is an arithmetic number, because the mean of its divisors is an integer number (953064).

Almost surely, 2^12121417 is an apocalyptic number.

It is an amenable number.

12121417 is a deficient number, since it is larger than the sum of its proper divisors (3127607).

12121417 is an equidigital number, since it uses as much as digits as its factorization.

12121417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1319 counting only the distinct ones).

The product of its digits is 112, while the sum is 19.

The square root of 12121417 is about 3481.5825424654. The cubic root of 12121417 is about 229.7124130843.

Adding to 12121417 its reverse (71412121), we get a palindrome (83533538).

The spelling of 12121417 in words is "twelve million, one hundred twenty-one thousand, four hundred seventeen".