12133312231 has 2 divisors, whose sum is σ = 12133312232. Its totient is φ = 12133312230.

The previous prime is 12133312189. The next prime is 12133312237. The reversal of 12133312231 is 13221333121.

It is a strong prime.

It is an emirp because it is prime and its reverse (13221333121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12133312231 is a prime.

It is a super-2 number, since 2×12133312231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12133312237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6066656115 + 6066656116.

It is an arithmetic number, because the mean of its divisors is an integer number (6066656116).

Almost surely, 2^12133312231 is an apocalyptic number.

12133312231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12133312231 is an equidigital number, since it uses as much as digits as its factorization.

12133312231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

Adding to 12133312231 its reverse (13221333121), we get a palindrome (25354645352).

The spelling of 12133312231 in words is "twelve billion, one hundred thirty-three million, three hundred twelve thousand, two hundred thirty-one".