13211210421173 has 2 divisors, whose sum is σ = 13211210421174. Its totient is φ = 13211210421172.

The previous prime is 13211210421151. The next prime is 13211210421239. The reversal of 13211210421173 is 37112401211231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9318568232689 + 3892642188484 = 3052633^2 + 1972978^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211210421173 - 2⁸ = 13211210420917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13211210421473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605605210586 + 6605605210587.

It is an arithmetic number, because the mean of its divisors is an integer number (6605605210587).

Almost surely, 2^{13211210421173} is an apocalyptic number.

It is an amenable number.

13211210421173 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211210421173 is an equidigital number, since it uses as much as digits as its factorization.

13211210421173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 13211210421173 in words is "thirteen trillion, two hundred eleven billion, two hundred ten million, four hundred twenty-one thousand, one hundred seventy-three".