1312321123331 has 4 divisors (see below), whose sum is σ = 1328932783200. Its totient is φ = 1295709463464.

The previous prime is 1312321123271. The next prime is 1312321123423. The reversal of 1312321123331 is 1333211232131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312321123331 is a prime.

It is a super-2 number, since 2×1312321123331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312321123331.

It is not an unprimeable number, because it can be changed into a prime (1312321123831) 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, 8305829816 + ... + 8305829973.

It is an arithmetic number, because the mean of its divisors is an integer number (332233195800).

Almost surely, 2^{1312321123331} is an apocalyptic number.

1312321123331 is a deficient number, since it is larger than the sum of its proper divisors (16611659869).

1312321123331 is an equidigital number, since it uses as much as digits as its factorization.

1312321123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16611659868.

The product of its digits is 1944, while the sum is 26.

Adding to 1312321123331 its reverse (1333211232131), we get a palindrome (2645532355462).

The spelling of 1312321123331 in words is "one trillion, three hundred twelve billion, three hundred twenty-one million, one hundred twenty-three thousand, three hundred thirty-one".