1312231333031 has 4 divisors (see below), whose sum is σ = 1354561376064. Its totient is φ = 1269901290000.

The previous prime is 1312231333027. The next prime is 1312231333033. The reversal of 1312231333031 is 1303331322131.

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 1312231333031 - 2² = 1312231333027 is a prime.

It is a super-2 number, since 2×1312231333031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312231333033) 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, 21165021470 + ... + 21165021531.

It is an arithmetic number, because the mean of its divisors is an integer number (338640344016).

Almost surely, 2^{1312231333031} is an apocalyptic number.

1312231333031 is a deficient number, since it is larger than the sum of its proper divisors (42330043033).

1312231333031 is an equidigital number, since it uses as much as digits as its factorization.

1312231333031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42330043032.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 1312231333031 its reverse (1303331322131), we get a palindrome (2615562655162).

The spelling of 1312231333031 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, three hundred thirty-three thousand, thirty-one".