212320320021197 has 2 divisors, whose sum is σ = 212320320021198. Its totient is φ = 212320320021196.

The previous prime is 212320320021157. The next prime is 212320320021217. The reversal of 212320320021197 is 791120023023212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119776805059081 + 92543514962116 = 10944259^2 + 9619954^2 .

It is a cyclic number.

It is not a de Polignac number, because 212320320021197 - 2²² = 212320315826893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212320320021157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160160010598 + 106160160010599.

It is an arithmetic number, because the mean of its divisors is an integer number (106160160010599).

Almost surely, 2^{212320320021197} is an apocalyptic number.

It is an amenable number.

212320320021197 is a deficient number, since it is larger than the sum of its proper divisors (1).

212320320021197 is an equidigital number, since it uses as much as digits as its factorization.

212320320021197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 212320320021197 in words is "two hundred twelve trillion, three hundred twenty billion, three hundred twenty million, twenty-one thousand, one hundred ninety-seven".