103820111 has 2 divisors, whose sum is σ = 103820112. Its totient is φ = 103820110.

The previous prime is 103820099. The next prime is 103820131. The reversal of 103820111 is 111028301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 103820111 - 2¹⁰ = 103819087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103820111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103820131) 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, 51910055 + 51910056.

It is an arithmetic number, because the mean of its divisors is an integer number (51910056).

Almost surely, 2^103820111 is an apocalyptic number.

103820111 is a deficient number, since it is larger than the sum of its proper divisors (1).

103820111 is an equidigital number, since it uses as much as digits as its factorization.

103820111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 103820111 is about 10189.2154261258. The cubic root of 103820111 is about 469.9956405209.

Adding to 103820111 its reverse (111028301), we get a palindrome (214848412).

The spelling of 103820111 in words is "one hundred three million, eight hundred twenty thousand, one hundred eleven".