13313323021 has 4 divisors (see below), whose sum is σ = 13315238172. Its totient is φ = 13311407872.

The previous prime is 13313323019. The next prime is 13313323027. The reversal of 13313323021 is 12032331331.

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 7273701796 + 6039621225 = 85286^2 + 77715^2 .

It is a cyclic number.

It is not a de Polignac number, because 13313323021 - 2¹ = 13313323019 is a prime.

It is a super-2 number, since 2×13313323021² (a number of 21 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 = 13313322983 and 13313323001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13313323027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947110 + ... + 961063.

It is an arithmetic number, because the mean of its divisors is an integer number (3328809543).

Almost surely, 2^13313323021 is an apocalyptic number.

It is an amenable number.

13313323021 is a deficient number, since it is larger than the sum of its proper divisors (1915151).

13313323021 is an equidigital number, since it uses as much as digits as its factorization.

13313323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915150.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 13313323021 its reverse (12032331331), we get a palindrome (25345654352).

The spelling of 13313323021 in words is "thirteen billion, three hundred thirteen million, three hundred twenty-three thousand, twenty-one".