1323001312331 has 4 divisors (see below), whose sum is σ = 1355269637064. Its totient is φ = 1290732987600.

The previous prime is 1323001312267. The next prime is 1323001312351. The reversal of 1323001312331 is 1332131003231.

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 1323001312331 - 2⁶ = 1323001312267 is a prime.

It is a super-2 number, since 2×1323001312331² (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 = 1323001312297 and 1323001312306.

It is not an unprimeable number, because it can be changed into a prime (1323001312351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16134162305 + ... + 16134162386.

It is an arithmetic number, because the mean of its divisors is an integer number (338817409266).

Almost surely, 2^{1323001312331} is an apocalyptic number.

1323001312331 is a deficient number, since it is larger than the sum of its proper divisors (32268324733).

1323001312331 is an equidigital number, since it uses as much as digits as its factorization.

1323001312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32268324732.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1323001312331 its reverse (1332131003231), we get a palindrome (2655132315562).

The spelling of 1323001312331 in words is "one trillion, three hundred twenty-three billion, one million, three hundred twelve thousand, three hundred thirty-one".