12231212117 has 2 divisors, whose sum is σ = 12231212118. Its totient is φ = 12231212116.

The previous prime is 12231212089. The next prime is 12231212153. The reversal of 12231212117 is 71121213221.

It is a happy number.

12231212117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11447716036 + 783496081 = 106994^2 + 27991^2 .

It is a cyclic number.

It is not a de Polignac number, because 12231212117 - 2²² = 12227017813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12231212092 and 12231212101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12231214117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115606058 + 6115606059.

It is an arithmetic number, because the mean of its divisors is an integer number (6115606059).

Almost surely, 2^12231212117 is an apocalyptic number.

It is an amenable number.

12231212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231212117 is an equidigital number, since it uses as much as digits as its factorization.

12231212117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

Adding to 12231212117 its reverse (71121213221), we get a palindrome (83352425338).

The spelling of 12231212117 in words is "twelve billion, two hundred thirty-one million, two hundred twelve thousand, one hundred seventeen".