1213123303 has 8 divisors (see below), whose sum is σ = 1393395200. Its totient is φ = 1034593560.

The previous prime is 1213123297. The next prime is 1213123313. The reversal of 1213123303 is 3033213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213123303 - 2⁹ = 1213122791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213123313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434043 + ... + 436828.

It is an arithmetic number, because the mean of its divisors is an integer number (174174400).

Almost surely, 2^1213123303 is an apocalyptic number.

1213123303 is a deficient number, since it is larger than the sum of its proper divisors (180271897).

1213123303 is an equidigital number, since it uses as much as digits as its factorization.

1213123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871077.

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

The square root of 1213123303 is about 34829.9196525057. The cubic root of 1213123303 is about 1066.5183081532.

Adding to 1213123303 its reverse (3033213121), we get a palindrome (4246336424).

The spelling of 1213123303 in words is "one billion, two hundred thirteen million, one hundred twenty-three thousand, three hundred three".