12421107 has 20 divisors (see below), whose sum is σ = 18774360. Its totient is φ = 8182944.

The previous prime is 12421103. The next prime is 12421121. The reversal of 12421107 is 70112421.

It is not a de Polignac number, because 12421107 - 2² = 12421103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12421107.

It is not an unprimeable number, because it can be changed into a prime (12421103) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6348 + ... + 8070.

It is an arithmetic number, because the mean of its divisors is an integer number (938718).

Almost surely, 2^12421107 is an apocalyptic number.

12421107 is a deficient number, since it is larger than the sum of its proper divisors (6353253).

12421107 is an equidigital number, since it uses as much as digits as its factorization.

12421107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 12421107 is about 3524.3590906717. The cubic root of 12421107 is about 231.5901590492.

Adding to 12421107 its reverse (70112421), we get a palindrome (82533528).

The spelling of 12421107 in words is "twelve million, four hundred twenty-one thousand, one hundred seven".