12212112211993 has 2 divisors, whose sum is σ = 12212112211994. Its totient is φ = 12212112211992.

The previous prime is 12212112211987. The next prime is 12212112212039. The reversal of 12212112211993 is 39911221121221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9982800436249 + 2229311775744 = 3159557^2 + 1493088^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212112211993 - 2¹⁷ = 12212112080921 is a prime.

It is not a weakly prime, because it can be changed into another prime (12212112211903) 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, 6106056105996 + 6106056105997.

It is an arithmetic number, because the mean of its divisors is an integer number (6106056105997).

Almost surely, 2^{12212112211993} is an apocalyptic number.

It is an amenable number.

12212112211993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212112211993 is an equidigital number, since it uses as much as digits as its factorization.

12212112211993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 37.

The spelling of 12212112211993 in words is "twelve trillion, two hundred twelve billion, one hundred twelve million, two hundred eleven thousand, nine hundred ninety-three".