1311310321031 has 4 divisors (see below), whose sum is σ = 1311562065600. Its totient is φ = 1311058576464.

The previous prime is 1311310321003. The next prime is 1311310321103. The reversal of 1311310321031 is 1301230131131.

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 1311310321031 - 2³⁰ = 1310236579207 is a prime.

It is a super-3 number, since 3×1311310321031³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311310320994 and 1311310321012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311310321931) 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, 125864471 + ... + 125874888.

It is an arithmetic number, because the mean of its divisors is an integer number (327890516400).

Almost surely, 2^{1311310321031} is an apocalyptic number.

1311310321031 is a deficient number, since it is larger than the sum of its proper divisors (251744569).

1311310321031 is an equidigital number, since it uses as much as digits as its factorization.

1311310321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251744568.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1311310321031 its reverse (1301230131131), we get a palindrome (2612540452162).

The spelling of 1311310321031 in words is "one trillion, three hundred eleven billion, three hundred ten million, three hundred twenty-one thousand, thirty-one".