1313123312311 has 4 divisors (see below), whose sum is σ = 1390365860112. Its totient is φ = 1235880764512.

The previous prime is 1313123312273. The next prime is 1313123312429. The reversal of 1313123312311 is 1132133213131.

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 1313123312311 - 2¹⁵ = 1313123279543 is a prime.

It is a super-2 number, since 2×1313123312311² (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 (1313123316311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38621273875 + ... + 38621273908.

It is an arithmetic number, because the mean of its divisors is an integer number (347591465028).

Almost surely, 2^{1313123312311} is an apocalyptic number.

1313123312311 is a deficient number, since it is larger than the sum of its proper divisors (77242547801).

1313123312311 is an equidigital number, since it uses as much as digits as its factorization.

1313123312311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77242547800.

The product of its digits is 972, while the sum is 25.

Adding to 1313123312311 its reverse (1132133213131), we get a palindrome (2445256525442).

The spelling of 1313123312311 in words is "one trillion, three hundred thirteen billion, one hundred twenty-three million, three hundred twelve thousand, three hundred eleven".