1311223043003 has 4 divisors (see below), whose sum is σ = 1311389597688. Its totient is φ = 1311056488320.

The previous prime is 1311223042979. The next prime is 1311223043023. The reversal of 1311223043003 is 3003403221131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311223043003 - 2¹⁰ = 1311223041979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311223043003.

It is not an unprimeable number, because it can be changed into a prime (1311223043023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83265533 + ... + 83281278.

It is an arithmetic number, because the mean of its divisors is an integer number (327847399422).

Almost surely, 2^{1311223043003} is an apocalyptic number.

1311223043003 is a deficient number, since it is larger than the sum of its proper divisors (166554685).

1311223043003 is an equidigital number, since it uses as much as digits as its factorization.

1311223043003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166554684.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1311223043003 its reverse (3003403221131), we get a palindrome (4314626264134).

The spelling of 1311223043003 in words is "one trillion, three hundred eleven billion, two hundred twenty-three million, forty-three thousand, three".