12166921836373 has 2 divisors, whose sum is σ = 12166921836374. Its totient is φ = 12166921836372.

The previous prime is 12166921836367. The next prime is 12166921836473. The reversal of 12166921836373 is 37363812966121.

12166921836373 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., 9220350469009 + 2946571367364 = 3036503^2 + 1716558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12166921836373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12166921836473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6083460918186 + 6083460918187.

It is an arithmetic number, because the mean of its divisors is an integer number (6083460918187).

Almost surely, 2^{12166921836373} is an apocalyptic number.

It is an amenable number.

12166921836373 is a deficient number, since it is larger than the sum of its proper divisors (1).

12166921836373 is an equidigital number, since it uses as much as digits as its factorization.

12166921836373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 58.

The spelling of 12166921836373 in words is "twelve trillion, one hundred sixty-six billion, nine hundred twenty-one million, eight hundred thirty-six thousand, three hundred seventy-three".