103111213 has 2 divisors, whose sum is σ = 103111214. Its totient is φ = 103111212.

The previous prime is 103111207. The next prime is 103111247. The reversal of 103111213 is 312111301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71605444 + 31505769 = 8462^2 + 5613^2 .

It is a cyclic number.

It is not a de Polignac number, because 103111213 - 2⁵ = 103111181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103111193 and 103111202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103111013) 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, 51555606 + 51555607.

It is an arithmetic number, because the mean of its divisors is an integer number (51555607).

Almost surely, 2^103111213 is an apocalyptic number.

It is an amenable number.

103111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

103111213 is an equidigital number, since it uses as much as digits as its factorization.

103111213 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 103111213 is about 10154.3691581506. The cubic root of 103111213 is about 468.9234648548.

Adding to 103111213 its reverse (312111301), we get a palindrome (415222514).

The spelling of 103111213 in words is "one hundred three million, one hundred eleven thousand, two hundred thirteen".