12222222197 has 2 divisors, whose sum is σ = 12222222198. Its totient is φ = 12222222196.

The previous prime is 12222222191. The next prime is 12222222253. The reversal of 12222222197 is 79122222221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12009091396 + 213130801 = 109586^2 + 14599^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222222197 - 2¹⁴ = 12222205813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222222191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111111098 + 6111111099.

It is an arithmetic number, because the mean of its divisors is an integer number (6111111099).

Almost surely, 2^12222222197 is an apocalyptic number.

It is an amenable number.

12222222197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222222197 is an equidigital number, since it uses as much as digits as its factorization.

12222222197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The spelling of 12222222197 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred ninety-seven".