12512111 has 2 divisors, whose sum is σ = 12512112. Its totient is φ = 12512110.

The previous prime is 12512107. The next prime is 12512113. The reversal of 12512111 is 11121521.

It is a strong prime.

It is an emirp because it is prime and its reverse (11121521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12512111 - 2² = 12512107 is a prime.

Together with 12512113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12512113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256055 + 6256056.

It is an arithmetic number, because the mean of its divisors is an integer number (6256056).

Almost surely, 2^12512111 is an apocalyptic number.

12512111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12512111 is an equidigital number, since it uses as much as digits as its factorization.

12512111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20, while the sum is 14.

The square root of 12512111 is about 3537.2462453157. The cubic root of 12512111 is about 232.1543698635.

Adding to 12512111 its reverse (11121521), we get a palindrome (23633632).

The spelling of 12512111 in words is "twelve million, five hundred twelve thousand, one hundred eleven".