12466161221 has 2 divisors, whose sum is σ = 12466161222. Its totient is φ = 12466161220.

The previous prime is 12466161187. The next prime is 12466161247. The reversal of 12466161221 is 12216166421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11993316196 + 472845025 = 109514^2 + 21745^2 .

It is a cyclic number.

It is not a de Polignac number, because 12466161221 - 2⁶ = 12466161157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12466160221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6233080610 + 6233080611.

It is an arithmetic number, because the mean of its divisors is an integer number (6233080611).

Almost surely, 2^12466161221 is an apocalyptic number.

It is an amenable number.

12466161221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12466161221 is an equidigital number, since it uses as much as digits as its factorization.

12466161221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The spelling of 12466161221 in words is "twelve billion, four hundred sixty-six million, one hundred sixty-one thousand, two hundred twenty-one".