12221001197 has 2 divisors, whose sum is σ = 12221001198. Its totient is φ = 12221001196.

The previous prime is 12221001181. The next prime is 12221001209. The reversal of 12221001197 is 79110012221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11940807076 + 280194121 = 109274^2 + 16739^2 .

It is an emirp because it is prime and its reverse (79110012221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12221001197 - 2⁴ = 12221001181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221001097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110500598 + 6110500599.

It is an arithmetic number, because the mean of its divisors is an integer number (6110500599).

Almost surely, 2^12221001197 is an apocalyptic number.

It is an amenable number.

12221001197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221001197 is an equidigital number, since it uses as much as digits as its factorization.

12221001197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 12221001197 in words is "twelve billion, two hundred twenty-one million, one thousand, one hundred ninety-seven".