1211144201171 has 2 divisors, whose sum is σ = 1211144201172. Its totient is φ = 1211144201170.

The previous prime is 1211144201161. The next prime is 1211144201173. The reversal of 1211144201171 is 1711024411121.

It is a strong prime.

It is an emirp because it is prime and its reverse (1711024411121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211144201171 is a prime.

Together with 1211144201173, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211144201171.

It is not a weakly prime, because it can be changed into another prime (1211144201173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605572100585 + 605572100586.

It is an arithmetic number, because the mean of its divisors is an integer number (605572100586).

Almost surely, 2^{1211144201171} is an apocalyptic number.

1211144201171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211144201171 is an equidigital number, since it uses as much as digits as its factorization.

1211144201171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 26.

Adding to 1211144201171 its reverse (1711024411121), we get a palindrome (2922168612292).

The spelling of 1211144201171 in words is "one trillion, two hundred eleven billion, one hundred forty-four million, two hundred one thousand, one hundred seventy-one".