13173791221075 has 12 divisors (see below), whose sum is σ = 16335552185920. Its totient is φ = 10539000027360.

The previous prime is 13173791221067. The next prime is 13173791221079. The reversal of 13173791221075 is 57012219737131.

It is not a de Polignac number, because 13173791221075 - 2³ = 13173791221067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13173791221079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10253182 + ... + 11466268.

Almost surely, 2^{13173791221075} is an apocalyptic number.

13173791221075 is a deficient number, since it is larger than the sum of its proper divisors (3161760964845).

13173791221075 is a wasteful number, since it uses less digits than its factorization.

13173791221075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647486 (or 1647481 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 49.

The spelling of 13173791221075 in words is "thirteen trillion, one hundred seventy-three billion, seven hundred ninety-one million, two hundred twenty-one thousand, seventy-five".