1217120754185 has 12 divisors (see below), whose sum is σ = 1699001216388. Its totient is φ = 834597088416.

The previous prime is 1217120754169. The next prime is 1217120754247. The reversal of 1217120754185 is 5814570217121.

It can be written as a sum of positive squares in 2 ways, for example, as 514715848969 + 702404905216 = 717437^2 + 838096^2 .

It is not a de Polignac number, because 1217120754185 - 2⁴ = 1217120754169 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2483919662 + ... + 2483920151.

It is an arithmetic number, because the mean of its divisors is an integer number (141583434699).

Almost surely, 2^{1217120754185} is an apocalyptic number.

It is an amenable number.

1217120754185 is a deficient number, since it is larger than the sum of its proper divisors (481880462203).

1217120754185 is an equidigital number, since it uses as much as digits as its factorization.

1217120754185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4967839832 (or 4967839825 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 44.

The spelling of 1217120754185 in words is "one trillion, two hundred seventeen billion, one hundred twenty million, seven hundred fifty-four thousand, one hundred eighty-five".