12221121197 has 2 divisors, whose sum is σ = 12221121198. Its totient is φ = 12221121196.

The previous prime is 12221121193. The next prime is 12221121221. The reversal of 12221121197 is 79112112221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9360369001 + 2860752196 = 96749^2 + 53486^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221121197 - 2² = 12221121193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221121193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110560598 + 6110560599.

It is an arithmetic number, because the mean of its divisors is an integer number (6110560599).

Almost surely, 2^12221121197 is an apocalyptic number.

It is an amenable number.

12221121197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221121197 is an equidigital number, since it uses as much as digits as its factorization.

12221121197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 29.

The spelling of 12221121197 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred ninety-seven".