1312311001231 has 4 divisors (see below), whose sum is σ = 1312382468992. Its totient is φ = 1312239533472.

The previous prime is 1312311001229. The next prime is 1312311001289. The reversal of 1312311001231 is 1321001132131.

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 1312311001231 - 2¹ = 1312311001229 is a prime.

It is a super-2 number, since 2×1312311001231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312311001199 and 1312311001208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312311001291) 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, 35706330 + ... + 35743063.

It is an arithmetic number, because the mean of its divisors is an integer number (328095617248).

Almost surely, 2^{1312311001231} is an apocalyptic number.

1312311001231 is a deficient number, since it is larger than the sum of its proper divisors (71467761).

1312311001231 is an equidigital number, since it uses as much as digits as its factorization.

1312311001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71467760.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1312311001231 its reverse (1321001132131), we get a palindrome (2633312133362).

The spelling of 1312311001231 in words is "one trillion, three hundred twelve billion, three hundred eleven million, one thousand, two hundred thirty-one".