12212197 has 2 divisors, whose sum is σ = 12212198. Its totient is φ = 12212196.

The previous prime is 12212191. The next prime is 12212201. The reversal of 12212197 is 79121221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11737476 + 474721 = 3426^2 + 689^2 .

It is an emirp because it is prime and its reverse (79121221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12212197 - 2¹⁹ = 11687909 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106098 + 6106099.

It is an arithmetic number, because the mean of its divisors is an integer number (6106099).

Almost surely, 2^12212197 is an apocalyptic number.

It is an amenable number.

12212197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212197 is an equidigital number, since it uses as much as digits as its factorization.

12212197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 12212197 is about 3494.5953986120. The cubic root of 12212197 is about 230.2844432922.

The spelling of 12212197 in words is "twelve million, two hundred twelve thousand, one hundred ninety-seven".