212001985717 has 2 divisors, whose sum is σ = 212001985718. Its totient is φ = 212001985716.

The previous prime is 212001985633. The next prime is 212001985747. The reversal of 212001985717 is 717589100212.

212001985717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179008532836 + 32993452881 = 423094^2 + 181641^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001985717 - 2²⁷ = 211867767989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001985747) 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, 106000992858 + 106000992859.

It is an arithmetic number, because the mean of its divisors is an integer number (106000992859).

Almost surely, 2^212001985717 is an apocalyptic number.

It is an amenable number.

212001985717 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001985717 is an equidigital number, since it uses as much as digits as its factorization.

212001985717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 43.

The spelling of 212001985717 in words is "two hundred twelve billion, one million, nine hundred eighty-five thousand, seven hundred seventeen".