212012210077 has 2 divisors, whose sum is σ = 212012210078. Its totient is φ = 212012210076.

The previous prime is 212012210063. The next prime is 212012210129. The reversal of 212012210077 is 770012210212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119093319801 + 92918890276 = 345099^2 + 304826^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012210077 - 2¹¹ = 212012208029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212012210057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006105038 + 106006105039.

It is an arithmetic number, because the mean of its divisors is an integer number (106006105039).

Almost surely, 2^212012210077 is an apocalyptic number.

It is an amenable number.

212012210077 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012210077 is an equidigital number, since it uses as much as digits as its factorization.

212012210077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 212012210077 its reverse (770012210212), we get a palindrome (982024420289).

The spelling of 212012210077 in words is "two hundred twelve billion, twelve million, two hundred ten thousand, seventy-seven".