1311224231043 has 16 divisors (see below), whose sum is σ = 1979206388640. Its totient is φ = 857656099872.

The previous prime is 1311224230949. The next prime is 1311224231099. The reversal of 1311224231043 is 3401324221131.

1311224231043 is a `hidden beast` number, since 1 + 311 + 2 + 242 + 3 + 104 + 3 = 666.

It is not a de Polignac number, because 1311224231043 - 2¹² = 1311224226947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1311224230998 and 1311224231016.

It is not an unprimeable number, because it can be changed into a prime (1311224231843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458148196 + ... + 458151057.

It is an arithmetic number, because the mean of its divisors is an integer number (123700399290).

Almost surely, 2^{1311224231043} is an apocalyptic number.

1311224231043 is a deficient number, since it is larger than the sum of its proper divisors (667982157597).

1311224231043 is an equidigital number, since it uses as much as digits as its factorization.

1311224231043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916299315 (or 916299309 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1311224231043 its reverse (3401324221131), we get a palindrome (4712548452174).

The spelling of 1311224231043 in words is "one trillion, three hundred eleven billion, two hundred twenty-four million, two hundred thirty-one thousand, forty-three".