1213203303 has 12 divisors (see below), whose sum is σ = 1887205320. Its totient is φ = 746586576.

The previous prime is 1213203293. The next prime is 1213203311. The reversal of 1213203303 is 3033023121.

1213203303 is a `hidden beast` number, since 12 + 1 + 320 + 330 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1213203303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213203353) 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 in 11 ways as a sum of consecutive naturals, for example, 5184513 + ... + 5184746.

It is an arithmetic number, because the mean of its divisors is an integer number (157267110).

Almost surely, 2^1213203303 is an apocalyptic number.

1213203303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213203303 is a deficient number, since it is larger than the sum of its proper divisors (674002017).

1213203303 is a wasteful number, since it uses less digits than its factorization.

1213203303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10369278 (or 10369275 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1213203303 is about 34831.0680714789. The cubic root of 1213203303 is about 1066.5417516589.

Adding to 1213203303 its reverse (3033023121), we get a palindrome (4246226424).

The spelling of 1213203303 in words is "one billion, two hundred thirteen million, two hundred three thousand, three hundred three".