12102111178643 has 2 divisors, whose sum is σ = 12102111178644. Its totient is φ = 12102111178642.

The previous prime is 12102111178639. The next prime is 12102111178679. The reversal of 12102111178643 is 34687111120121.

It is a happy number.

12102111178643 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 is a cyclic number.

It is not a de Polignac number, because 12102111178643 - 2² = 12102111178639 is a prime.

It is a super-2 number, since 2×12102111178643² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12102111178597 and 12102111178606.

It is not a weakly prime, because it can be changed into another prime (12102113178643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051055589321 + 6051055589322.

It is an arithmetic number, because the mean of its divisors is an integer number (6051055589322).

Almost surely, 2^{12102111178643} is an apocalyptic number.

12102111178643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102111178643 is an equidigital number, since it uses as much as digits as its factorization.

12102111178643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

Adding to 12102111178643 its reverse (34687111120121), we get a palindrome (46789222298764).

The spelling of 12102111178643 in words is "twelve trillion, one hundred two billion, one hundred eleven million, one hundred seventy-eight thousand, six hundred forty-three".