212220110022197 has 2 divisors, whose sum is σ = 212220110022198. Its totient is φ = 212220110022196.

The previous prime is 212220110022191. The next prime is 212220110022229. The reversal of 212220110022197 is 791220011022212.

It is an a-pointer prime, because the next prime (212220110022229) can be obtained adding 212220110022197 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192196937247121 + 20023172775076 = 13863511^2 + 4474726^2 .

It is a cyclic number.

It is not a de Polignac number, because 212220110022197 - 2¹⁶ = 212220109956661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220110022191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110055011098 + 106110055011099.

It is an arithmetic number, because the mean of its divisors is an integer number (106110055011099).

Almost surely, 2^{212220110022197} is an apocalyptic number.

It is an amenable number.

212220110022197 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220110022197 is an equidigital number, since it uses as much as digits as its factorization.

212220110022197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 212220110022197 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred ten million, twenty-two thousand, one hundred ninety-seven".