12133123217 has 2 divisors, whose sum is σ = 12133123218. Its totient is φ = 12133123216.

The previous prime is 12133123187. The next prime is 12133123229. The reversal of 12133123217 is 71232133121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11560765441 + 572357776 = 107521^2 + 23924^2 .

It is a cyclic number.

It is not a de Polignac number, because 12133123217 - 2¹² = 12133119121 is a prime.

It is not a weakly prime, because it can be changed into another prime (12133123237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6066561608 + 6066561609.

It is an arithmetic number, because the mean of its divisors is an integer number (6066561609).

Almost surely, 2^12133123217 is an apocalyptic number.

It is an amenable number.

12133123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12133123217 is an equidigital number, since it uses as much as digits as its factorization.

12133123217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

Adding to 12133123217 its reverse (71232133121), we get a palindrome (83365256338).

The spelling of 12133123217 in words is "twelve billion, one hundred thirty-three million, one hundred twenty-three thousand, two hundred seventeen".