1331323023313 has 4 divisors (see below), whose sum is σ = 1331362286500. Its totient is φ = 1331283760128.

The previous prime is 1331323023301. The next prime is 1331323023379. The reversal of 1331323023313 is 3133203231331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 923630557249 + 407692466064 = 961057^2 + 638508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331323023313 - 2³⁷ = 1193884069841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331323021313) 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, 19580688 + ... + 19648561.

It is an arithmetic number, because the mean of its divisors is an integer number (332840571625).

Almost surely, 2^{1331323023313} is an apocalyptic number.

It is an amenable number.

1331323023313 is a deficient number, since it is larger than the sum of its proper divisors (39263187).

1331323023313 is an equidigital number, since it uses as much as digits as its factorization.

1331323023313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39263186.

The product of its (nonzero) digits is 8748, while the sum is 28.

Adding to 1331323023313 its reverse (3133203231331), we get a palindrome (4464526254644).

The spelling of 1331323023313 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-three million, twenty-three thousand, three hundred thirteen".