13320120321 has 6 divisors (see below), whose sum is σ = 19240173810. Its totient is φ = 8880080208.

The previous prime is 13320120293. The next prime is 13320120337. The reversal of 13320120321 is 12302102331.

13320120321 is a `hidden beast` number, since 1 + 3 + 320 + 1 + 20 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13262055921 + 58064400 = 115161^2 + 7620^2 .

It is not a de Polignac number, because 13320120321 - 2⁷ = 13320120193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13320120294 and 13320120303.

It is not an unprimeable number, because it can be changed into a prime (13320120421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 740006676 + ... + 740006693.

It is an arithmetic number, because the mean of its divisors is an integer number (3206695635).

Almost surely, 2^13320120321 is an apocalyptic number.

It is an amenable number.

13320120321 is a deficient number, since it is larger than the sum of its proper divisors (5920053489).

13320120321 is a wasteful number, since it uses less digits than its factorization.

13320120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480013375 (or 1480013372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13320120321 its reverse (12302102331), we get a palindrome (25622222652).

The spelling of 13320120321 in words is "thirteen billion, three hundred twenty million, one hundred twenty thousand, three hundred twenty-one".