321212417 has 2 divisors, whose sum is σ = 321212418. Its totient is φ = 321212416.

The previous prime is 321212413. The next prime is 321212453. The reversal of 321212417 is 714212123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321162241 + 50176 = 17921^2 + 224^2 .

It is a cyclic number.

It is not a de Polignac number, because 321212417 - 2² = 321212413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321212392 and 321212401.

It is not a weakly prime, because it can be changed into another prime (321212413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160606208 + 160606209.

It is an arithmetic number, because the mean of its divisors is an integer number (160606209).

Almost surely, 2^321212417 is an apocalyptic number.

It is an amenable number.

321212417 is a deficient number, since it is larger than the sum of its proper divisors (1).

321212417 is an equidigital number, since it uses as much as digits as its factorization.

321212417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 321212417 is about 17922.3998672053. The cubic root of 321212417 is about 684.8531249558.

The spelling of 321212417 in words is "three hundred twenty-one million, two hundred twelve thousand, four hundred seventeen".