1312231321311 has 16 divisors (see below), whose sum is σ = 1755233625600. Its totient is φ = 872027755808.

The previous prime is 1312231321283. The next prime is 1312231321321. The reversal of 1312231321311 is 1131231322131.

It is a cyclic number.

It is not a de Polignac number, because 1312231321311 - 2⁵ = 1312231321279 is a prime.

It is a super-2 number, since 2×1312231321311² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312231321321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525510 + ... + 2225228.

It is an arithmetic number, because the mean of its divisors is an integer number (109702101600).

Almost surely, 2^{1312231321311} is an apocalyptic number.

1312231321311 is a deficient number, since it is larger than the sum of its proper divisors (443002304289).

1312231321311 is a wasteful number, since it uses less digits than its factorization.

1312231321311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701718.

The product of its digits is 648, while the sum is 24.

Adding to 1312231321311 its reverse (1131231322131), we get a palindrome (2443462643442).

The spelling of 1312231321311 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred eleven".