13120010020321 has 16 divisors (see below), whose sum is σ = 13920769444608. Its totient is φ = 12322498988800.

The previous prime is 13120010020303. The next prime is 13120010020331. The reversal of 13120010020321 is 12302001002131.

It is a cyclic number.

It is not a de Polignac number, because 13120010020321 - 2¹⁷ = 13120009889249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120010020295 and 13120010020304.

It is not an unprimeable number, because it can be changed into a prime (13120010020331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15270186 + ... + 16106476.

It is an arithmetic number, because the mean of its divisors is an integer number (870048090288).

Almost surely, 2^{13120010020321} is an apocalyptic number.

It is an amenable number.

13120010020321 is a deficient number, since it is larger than the sum of its proper divisors (800759424287).

13120010020321 is a wasteful number, since it uses less digits than its factorization.

13120010020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838232.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13120010020321 its reverse (12302001002131), we get a palindrome (25422011022452).

The spelling of 13120010020321 in words is "thirteen trillion, one hundred twenty billion, ten million, twenty thousand, three hundred twenty-one".