1312231111303 has 4 divisors (see below), whose sum is σ = 1499692698640. Its totient is φ = 1124769523968.

The previous prime is 1312231111267. The next prime is 1312231111333. The reversal of 1312231111303 is 3031111322131.

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 1312231111303 - 2³⁷ = 1174792157831 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 (1312231111333) 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 3 ways as a sum of consecutive naturals, for example, 93730793658 + ... + 93730793671.

It is an arithmetic number, because the mean of its divisors is an integer number (374923174660).

Almost surely, 2^{1312231111303} is an apocalyptic number.

1312231111303 is a deficient number, since it is larger than the sum of its proper divisors (187461587337).

1312231111303 is an equidigital number, since it uses as much as digits as its factorization.

1312231111303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187461587336.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1312231111303 its reverse (3031111322131), we get a palindrome (4343342433434).

The spelling of 1312231111303 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, one hundred eleven thousand, three hundred three".