2012103209 has 2 divisors, whose sum is σ = 2012103210. Its totient is φ = 2012103208.

The previous prime is 2012103157. The next prime is 2012103271. The reversal of 2012103209 is 9023012102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1445520400 + 566582809 = 38020^2 + 23803^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012103209 - 2¹⁶ = 2012037673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2012103109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006051604 + 1006051605.

It is an arithmetic number, because the mean of its divisors is an integer number (1006051605).

Almost surely, 2^2012103209 is an apocalyptic number.

It is an amenable number.

2012103209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012103209 is an equidigital number, since it uses as much as digits as its factorization.

2012103209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2012103209 is about 44856.4734347229. The cubic root of 2012103209 is about 1262.4574549464.

The spelling of 2012103209 in words is "two billion, twelve million, one hundred three thousand, two hundred nine".