321212317 has 2 divisors, whose sum is σ = 321212318. Its totient is φ = 321212316.

The previous prime is 321212267. The next prime is 321212321. The reversal of 321212317 is 713212123.

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., 187717401 + 133494916 = 13701^2 + 11554^2 .

It is a cyclic number.

It is not a de Polignac number, because 321212317 - 2¹¹ = 321210269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321212357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160606158 + 160606159.

It is an arithmetic number, because the mean of its divisors is an integer number (160606159).

Almost surely, 2^321212317 is an apocalyptic number.

It is an amenable number.

321212317 is a deficient number, since it is larger than the sum of its proper divisors (1).

321212317 is an equidigital number, since it uses as much as digits as its factorization.

321212317 is an evil number, because the sum of its binary digits is even.

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

The square root of 321212317 is about 17922.3970774001. The cubic root of 321212317 is about 684.8530538862.

The spelling of 321212317 in words is "three hundred twenty-one million, two hundred twelve thousand, three hundred seventeen".