12158321641 has 2 divisors, whose sum is σ = 12158321642. Its totient is φ = 12158321640.

The previous prime is 12158321633. The next prime is 12158321713. The reversal of 12158321641 is 14612385121.

12158321641 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., 10903745241 + 1254576400 = 104421^2 + 35420^2 .

It is a cyclic number.

It is not a de Polignac number, because 12158321641 - 2³ = 12158321633 is a prime.

It is a super-3 number, since 3×12158321641³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12158321597 and 12158321606.

It is not a weakly prime, because it can be changed into another prime (12158321611) 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, 6079160820 + 6079160821.

It is an arithmetic number, because the mean of its divisors is an integer number (6079160821).

Almost surely, 2^12158321641 is an apocalyptic number.

It is an amenable number.

12158321641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12158321641 is an equidigital number, since it uses as much as digits as its factorization.

12158321641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The spelling of 12158321641 in words is "twelve billion, one hundred fifty-eight million, three hundred twenty-one thousand, six hundred forty-one".