12031143217 has 2 divisors, whose sum is σ = 12031143218. Its totient is φ = 12031143216.

The previous prime is 12031143169. The next prime is 12031143233. The reversal of 12031143217 is 71234113021.

12031143217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10766345121 + 1264798096 = 103761^2 + 35564^2 .

It is an emirp because it is prime and its reverse (71234113021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12031143217 - 2²⁷ = 11896925489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12031143191 and 12031143200.

It is not a weakly prime, because it can be changed into another prime (12031143017) 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, 6015571608 + 6015571609.

It is an arithmetic number, because the mean of its divisors is an integer number (6015571609).

Almost surely, 2^12031143217 is an apocalyptic number.

It is an amenable number.

12031143217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031143217 is an equidigital number, since it uses as much as digits as its factorization.

12031143217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 12031143217 its reverse (71234113021), we get a palindrome (83265256238).

The spelling of 12031143217 in words is "twelve billion, thirty-one million, one hundred forty-three thousand, two hundred seventeen".