103213321 has 2 divisors, whose sum is σ = 103213322. Its totient is φ = 103213320.

The previous prime is 103213303. The next prime is 103213333. The reversal of 103213321 is 123312301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89038096 + 14175225 = 9436^2 + 3765^2 .

It is a cyclic number.

It is not a de Polignac number, because 103213321 - 2⁵ = 103213289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103213295 and 103213304.

It is not a weakly prime, because it can be changed into another prime (103213381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51606660 + 51606661.

It is an arithmetic number, because the mean of its divisors is an integer number (51606661).

Almost surely, 2^103213321 is an apocalyptic number.

It is an amenable number.

103213321 is a deficient number, since it is larger than the sum of its proper divisors (1).

103213321 is an equidigital number, since it uses as much as digits as its factorization.

103213321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 103213321 is about 10159.3957005326. The cubic root of 103213321 is about 469.0782008253.

Adding to 103213321 its reverse (123312301), we get a palindrome (226525622).

The spelling of 103213321 in words is "one hundred three million, two hundred thirteen thousand, three hundred twenty-one".