1320191450217 has 12 divisors (see below), whose sum is σ = 2019116335860. Its totient is φ = 828355419648.

The previous prime is 1320191450209. The next prime is 1320191450273. The reversal of 1320191450217 is 7120541910231.

It is a happy number.

1320191450217 is a `hidden beast` number, since 1 + 3 + 2 + 0 + 191 + 450 + 2 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1232786075481 + 87405374736 = 1110309^2 + 295644^2 .

It is not a de Polignac number, because 1320191450217 - 2³ = 1320191450209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320191450297) 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, 4314350992 + ... + 4314351297.

It is an arithmetic number, because the mean of its divisors is an integer number (168259694655).

Almost surely, 2^{1320191450217} is an apocalyptic number.

1320191450217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1320191450217 is a deficient number, since it is larger than the sum of its proper divisors (698924885643).

1320191450217 is a wasteful number, since it uses less digits than its factorization.

1320191450217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628702312 (or 8628702309 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 1320191450217 in words is "one trillion, three hundred twenty billion, one hundred ninety-one million, four hundred fifty thousand, two hundred seventeen".