211206103 has 2 divisors, whose sum is σ = 211206104. Its totient is φ = 211206102.

The previous prime is 211206097. The next prime is 211206119. The reversal of 211206103 is 301602112.

It is an a-pointer prime, because the next prime (211206119) can be obtained adding 211206103 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211206103 - 2⁹ = 211205591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211206143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105603051 + 105603052.

It is an arithmetic number, because the mean of its divisors is an integer number (105603052).

Almost surely, 2^211206103 is an apocalyptic number.

211206103 is a deficient number, since it is larger than the sum of its proper divisors (1).

211206103 is an equidigital number, since it uses as much as digits as its factorization.

211206103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 211206103 is about 14532.9316725842. The cubic root of 211206103 is about 595.5279573512.

Adding to 211206103 its reverse (301602112), we get a palindrome (512808215).

The spelling of 211206103 in words is "two hundred eleven million, two hundred six thousand, one hundred three".