1213012003 has 24 divisors (see below), whose sum is σ = 1489259520. Its totient is φ = 982391760.

The previous prime is 1213011997. The next prime is 1213012013. The reversal of 1213012003 is 3002103121.

It is not a de Polignac number, because 1213012003 - 2⁹ = 1213011491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213012013) 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 23 ways as a sum of consecutive naturals, for example, 399750 + ... + 402772.

It is an arithmetic number, because the mean of its divisors is an integer number (62052480).

Almost surely, 2^1213012003 is an apocalyptic number.

1213012003 is a deficient number, since it is larger than the sum of its proper divisors (276247517).

1213012003 is a wasteful number, since it uses less digits than its factorization.

1213012003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487 (or 3480 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1213012003 is about 34828.3218516196. The cubic root of 1213012003 is about 1066.4856906615.

Adding to 1213012003 its reverse (3002103121), we get a palindrome (4215115124).

The spelling of 1213012003 in words is "one billion, two hundred thirteen million, twelve thousand, three".