1213221203 has 2 divisors, whose sum is σ = 1213221204. Its totient is φ = 1213221202.

The previous prime is 1213221169. The next prime is 1213221277. The reversal of 1213221203 is 3021223121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213221203 - 2⁸ = 1213220947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1213224203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606610601 + 606610602.

It is an arithmetic number, because the mean of its divisors is an integer number (606610602).

Almost surely, 2^1213221203 is an apocalyptic number.

1213221203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213221203 is an equidigital number, since it uses as much as digits as its factorization.

1213221203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1213221203 is about 34831.3250250403. The cubic root of 1213221203 is about 1066.5469970022.

Adding to 1213221203 its reverse (3021223121), we get a palindrome (4234444324).

The spelling of 1213221203 in words is "one billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred three".