12216196197 has 10 divisors (see below), whose sum is σ = 18248885798. Its totient is φ = 8144130744.

The previous prime is 12216196189. The next prime is 12216196217. The reversal of 12216196197 is 79169161221.

12216196197 is a `hidden beast` number, since 1 + 2 + 2 + 16 + 19 + 619 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11276528481 + 939667716 = 106191^2 + 30654^2 .

It is not a de Polignac number, because 12216196197 - 2³ = 12216196189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216196177) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 75408538 + ... + 75408699.

Almost surely, 2^12216196197 is an apocalyptic number.

It is an amenable number.

12216196197 is a deficient number, since it is larger than the sum of its proper divisors (6032689601).

12216196197 is an equidigital number, since it uses as much as digits as its factorization.

12216196197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150817249 (or 150817240 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The spelling of 12216196197 in words is "twelve billion, two hundred sixteen million, one hundred ninety-six thousand, one hundred ninety-seven".