1201203209 has 2 divisors, whose sum is σ = 1201203210. Its totient is φ = 1201203208.

The previous prime is 1201203197. The next prime is 1201203233. The reversal of 1201203209 is 9023021021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655513609 + 545689600 = 25603^2 + 23360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201203209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201203109) 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, 600601604 + 600601605.

It is an arithmetic number, because the mean of its divisors is an integer number (600601605).

Almost surely, 2^1201203209 is an apocalyptic number.

It is an amenable number.

1201203209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201203209 is an equidigital number, since it uses as much as digits as its factorization.

1201203209 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 1201203209 is about 34658.3786262427. The cubic root of 1201203209 is about 1063.0136173083.

The spelling of 1201203209 in words is "one billion, two hundred one million, two hundred three thousand, two hundred nine".