1213313203 has 2 divisors, whose sum is σ = 1213313204. Its totient is φ = 1213313202.

The previous prime is 1213313177. The next prime is 1213313279. The reversal of 1213313203 is 3023133121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213313203 - 2⁹ = 1213312691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213343203) 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, 606656601 + 606656602.

It is an arithmetic number, because the mean of its divisors is an integer number (606656602).

Almost surely, 2^1213313203 is an apocalyptic number.

1213313203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213313203 is an equidigital number, since it uses as much as digits as its factorization.

1213313203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1213313203 is about 34832.6456503091. The cubic root of 1213313203 is about 1066.5739554946.

Adding to 1213313203 its reverse (3023133121), we get a palindrome (4236446324).

The spelling of 1213313203 in words is "one billion, two hundred thirteen million, three hundred thirteen thousand, two hundred three".