1311503664123 has 12 divisors (see below), whose sum is σ = 1894411481248. Its totient is φ = 874327791600.

The previous prime is 1311503664083. The next prime is 1311503664151. The reversal of 1311503664123 is 3214663051131.

1311503664123 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 5 + 0 + 3 + 6 + 641 + 2 + 3 = 666.

It is not a de Polignac number, because 1311503664123 - 2⁶ = 1311503664059 is a prime.

It is a super-2 number, since 2×1311503664123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311503664193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 478398 + ... + 1688748.

Almost surely, 2^{1311503664123} is an apocalyptic number.

1311503664123 is a deficient number, since it is larger than the sum of its proper divisors (582907817125).

1311503664123 is a wasteful number, since it uses less digits than its factorization.

1311503664123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330754 (or 1330751 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 1311503664123 in words is "one trillion, three hundred eleven billion, five hundred three million, six hundred sixty-four thousand, one hundred twenty-three".