212112201211997 has 2 divisors, whose sum is σ = 212112201211998. Its totient is φ = 212112201211996.

The previous prime is 212112201211961. The next prime is 212112201212033. The reversal of 212112201211997 is 799112102211212.

It is a balanced prime because it is at equal distance from previous prime (212112201211961) and next prime (212112201212033).

It can be written as a sum of positive squares in only one way, i.e., 137499333972121 + 74612867239876 = 11726011^2 + 8637874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212112201211997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212112201211957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056100605998 + 106056100605999.

It is an arithmetic number, because the mean of its divisors is an integer number (106056100605999).

Almost surely, 2^{212112201211997} is an apocalyptic number.

It is an amenable number.

212112201211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112201211997 is an equidigital number, since it uses as much as digits as its factorization.

212112201211997 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 41.

The spelling of 212112201211997 in words is "two hundred twelve trillion, one hundred twelve billion, two hundred one million, two hundred eleven thousand, nine hundred ninety-seven".