12012221197 has 2 divisors, whose sum is σ = 12012221198. Its totient is φ = 12012221196.

The previous prime is 12012221159. The next prime is 12012221227. The reversal of 12012221197 is 79112221021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6911261956 + 5100959241 = 83134^2 + 71421^2 .

It is an emirp because it is prime and its reverse (79112221021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12012221197 - 2¹⁵ = 12012188429 is a prime.

It is a super-2 number, since 2×12012221197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012221297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006110598 + 6006110599.

It is an arithmetic number, because the mean of its divisors is an integer number (6006110599).

Almost surely, 2^12012221197 is an apocalyptic number.

It is an amenable number.

12012221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012221197 is an equidigital number, since it uses as much as digits as its factorization.

12012221197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The spelling of 12012221197 in words is "twelve billion, twelve million, two hundred twenty-one thousand, one hundred ninety-seven".