321012017 has 2 divisors, whose sum is σ = 321012018. Its totient is φ = 321012016.

The previous prime is 321011987. The next prime is 321012019. The reversal of 321012017 is 710210123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177395761 + 143616256 = 13319^2 + 11984^2 .

It is a cyclic number.

It is not a de Polignac number, because 321012017 - 2⁶ = 321011953 is a prime.

Together with 321012019, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 321011986 and 321012004.

It is not a weakly prime, because it can be changed into another prime (321012019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160506008 + 160506009.

It is an arithmetic number, because the mean of its divisors is an integer number (160506009).

Almost surely, 2^321012017 is an apocalyptic number.

It is an amenable number.

321012017 is a deficient number, since it is larger than the sum of its proper divisors (1).

321012017 is an equidigital number, since it uses as much as digits as its factorization.

321012017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 321012017 is about 17916.8082257974. The cubic root of 321012017 is about 684.7106718515.

The spelling of 321012017 in words is "three hundred twenty-one million, twelve thousand, seventeen".