212102111201177 has 2 divisors, whose sum is σ = 212102111201178. Its totient is φ = 212102111201176.

The previous prime is 212102111201171. The next prime is 212102111201287. The reversal of 212102111201177 is 771102111201212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205966958699401 + 6135152501776 = 14351549^2 + 2476924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212102111201177 is a prime.

It is not a weakly prime, because it can be changed into another prime (212102111201171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051055600588 + 106051055600589.

It is an arithmetic number, because the mean of its divisors is an integer number (106051055600589).

Almost surely, 2^{212102111201177} is an apocalyptic number.

It is an amenable number.

212102111201177 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102111201177 is an equidigital number, since it uses as much as digits as its factorization.

212102111201177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 29.

Adding to 212102111201177 its reverse (771102111201212), we get a palindrome (983204222402389).

The spelling of 212102111201177 in words is "two hundred twelve trillion, one hundred two billion, one hundred eleven million, two hundred one thousand, one hundred seventy-seven".