1205802111671 has 2 divisors, whose sum is σ = 1205802111672. Its totient is φ = 1205802111670.

The previous prime is 1205802111617. The next prime is 1205802111691. The reversal of 1205802111671 is 1761112085021.

Together with previous prime (1205802111617) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1761112085021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205802111671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205802111691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602901055835 + 602901055836.

It is an arithmetic number, because the mean of its divisors is an integer number (602901055836).

Almost surely, 2^{1205802111671} is an apocalyptic number.

1205802111671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205802111671 is an equidigital number, since it uses as much as digits as its factorization.

1205802111671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 35.

Adding to 1205802111671 its reverse (1761112085021), we get a palindrome (2966914196692).

The spelling of 1205802111671 in words is "one trillion, two hundred five billion, eight hundred two million, one hundred eleven thousand, six hundred seventy-one".