12511231 has 2 divisors, whose sum is σ = 12511232. Its totient is φ = 12511230.

The previous prime is 12511229. The next prime is 12511271. The reversal of 12511231 is 13211521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12511231 - 2¹ = 12511229 is a prime.

It is a super-2 number, since 2×12511231² = 313061802270722, which contains 22 as substring.

Together with 12511229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12511211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255615 + 6255616.

It is an arithmetic number, because the mean of its divisors is an integer number (6255616).

Almost surely, 2^12511231 is an apocalyptic number.

12511231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12511231 is an equidigital number, since it uses as much as digits as its factorization.

12511231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60, while the sum is 16.

The square root of 12511231 is about 3537.1218525801. The cubic root of 12511231 is about 232.1489271200.

Adding to 12511231 its reverse (13211521), we get a palindrome (25722752).

The spelling of 12511231 in words is "twelve million, five hundred eleven thousand, two hundred thirty-one".