12521107 has 2 divisors, whose sum is σ = 12521108. Its totient is φ = 12521106.

The previous prime is 12521101. The next prime is 12521137. The reversal of 12521107 is 70112521.

12521107 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12521107 - 2³ = 12521099 is a prime.

It is a Chen prime.

It is equal to p₈₂₀₀₀₉ and since 12521107 and 820009 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12521101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260553 + 6260554.

It is an arithmetic number, because the mean of its divisors is an integer number (6260554).

Almost surely, 2^12521107 is an apocalyptic number.

12521107 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521107 is an equidigital number, since it uses as much as digits as its factorization.

12521107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 12521107 is about 3538.5176274819. The cubic root of 12521107 is about 232.2099949132.

Adding to 12521107 its reverse (70112521), we get a palindrome (82633628).

The spelling of 12521107 in words is "twelve million, five hundred twenty-one thousand, one hundred seven".