212105305567 has 2 divisors, whose sum is σ = 212105305568. Its totient is φ = 212105305566.

The previous prime is 212105305553. The next prime is 212105305597. The reversal of 212105305567 is 765503501212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212105305567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212105305507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106052652783 + 106052652784.

It is an arithmetic number, because the mean of its divisors is an integer number (106052652784).

Almost surely, 2^212105305567 is an apocalyptic number.

212105305567 is a deficient number, since it is larger than the sum of its proper divisors (1).

212105305567 is an equidigital number, since it uses as much as digits as its factorization.

212105305567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 37.

Adding to 212105305567 its reverse (765503501212), we get a palindrome (977608806779).

The spelling of 212105305567 in words is "two hundred twelve billion, one hundred five million, three hundred five thousand, five hundred sixty-seven".