1313212323231 has 16 divisors (see below), whose sum is σ = 1946972538720. Its totient is φ = 874812121920.

The previous prime is 1313212323229. The next prime is 1313212323251. The reversal of 1313212323231 is 1323232123131.

1313212323231 is a `hidden beast` number, since 1 + 313 + 2 + 1 + 2 + 323 + 23 + 1 = 666.

It is not a de Polignac number, because 1313212323231 - 2¹ = 1313212323229 is a prime.

It is a super-2 number, since 2×1313212323231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1313212323195 and 1313212323204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313212323251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18373680 + ... + 18445013.

It is an arithmetic number, because the mean of its divisors is an integer number (121685783670).

Almost surely, 2^{1313212323231} is an apocalyptic number.

1313212323231 is a deficient number, since it is larger than the sum of its proper divisors (633760215489).

1313212323231 is a wasteful number, since it uses less digits than its factorization.

1313212323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36820023 (or 36820017 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1313212323231 its reverse (1323232123131), we get a palindrome (2636444446362).

The spelling of 1313212323231 in words is "one trillion, three hundred thirteen billion, two hundred twelve million, three hundred twenty-three thousand, two hundred thirty-one".