320121320017 has 2 divisors, whose sum is σ = 320121320018. Its totient is φ = 320121320016.

The previous prime is 320121319997. The next prime is 320121320021. The reversal of 320121320017 is 710023121023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307541230096 + 12580089921 = 554564^2 + 112161^2 .

It is an emirp because it is prime and its reverse (710023121023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320121320017 is a prime.

It is a super-3 number, since 3×320121320017³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320121320017.

It is not a weakly prime, because it can be changed into another prime (320121327017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160060660008 + 160060660009.

It is an arithmetic number, because the mean of its divisors is an integer number (160060660009).

Almost surely, 2^320121320017 is an apocalyptic number.

It is an amenable number.

320121320017 is a deficient number, since it is larger than the sum of its proper divisors (1).

320121320017 is an equidigital number, since it uses as much as digits as its factorization.

320121320017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The spelling of 320121320017 in words is "three hundred twenty billion, one hundred twenty-one million, three hundred twenty thousand, seventeen".