103111321 has 2 divisors, whose sum is σ = 103111322. Its totient is φ = 103111320.

The previous prime is 103111313. The next prime is 103111331. The reversal of 103111321 is 123111301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55294096 + 47817225 = 7436^2 + 6915^2 .

It is an emirp because it is prime and its reverse (123111301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103111321 - 2³ = 103111313 is a prime.

It is not a weakly prime, because it can be changed into another prime (103111331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51555660 + 51555661.

It is an arithmetic number, because the mean of its divisors is an integer number (51555661).

Almost surely, 2^103111321 is an apocalyptic number.

It is an amenable number.

103111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

103111321 is an equidigital number, since it uses as much as digits as its factorization.

103111321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 103111321 is about 10154.3744760571. The cubic root of 103111321 is about 468.9236285735.

Adding to 103111321 its reverse (123111301), we get a palindrome (226222622).

The spelling of 103111321 in words is "one hundred three million, one hundred eleven thousand, three hundred twenty-one".