212120103317 has 2 divisors, whose sum is σ = 212120103318. Its totient is φ = 212120103316.

The previous prime is 212120103313. The next prime is 212120103359. The reversal of 212120103317 is 713301021212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147363086641 + 64757016676 = 383879^2 + 254474^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120103317 - 2² = 212120103313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212120103292 and 212120103301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212120103311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060051658 + 106060051659.

It is an arithmetic number, because the mean of its divisors is an integer number (106060051659).

Almost surely, 2^212120103317 is an apocalyptic number.

It is an amenable number.

212120103317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120103317 is an equidigital number, since it uses as much as digits as its factorization.

212120103317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 212120103317 its reverse (713301021212), we get a palindrome (925421124529).

The spelling of 212120103317 in words is "two hundred twelve billion, one hundred twenty million, one hundred three thousand, three hundred seventeen".