12209999978201 has 2 divisors, whose sum is σ = 12209999978202. Its totient is φ = 12209999978200.

The previous prime is 12209999978191. The next prime is 12209999978221. The reversal of 12209999978201 is 10287999990221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10684530438400 + 1525469539801 = 3268720^2 + 1235099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12209999978201 is a prime.

It is not a weakly prime, because it can be changed into another prime (12209999978221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6104999989100 + 6104999989101.

It is an arithmetic number, because the mean of its divisors is an integer number (6104999989101).

Almost surely, 2^{12209999978201} is an apocalyptic number.

It is an amenable number.

12209999978201 is a deficient number, since it is larger than the sum of its proper divisors (1).

12209999978201 is an equidigital number, since it uses as much as digits as its factorization.

12209999978201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26453952, while the sum is 68.

The spelling of 12209999978201 in words is "twelve trillion, two hundred nine billion, nine hundred ninety-nine million, nine hundred seventy-eight thousand, two hundred one".