13120013221 has 16 divisors (see below), whose sum is σ = 15664947840. Its totient is φ = 10750420800.

The previous prime is 13120013213. The next prime is 13120013281. The reversal of 13120013221 is 12231002131.

It is not a de Polignac number, because 13120013221 - 2³ = 13120013213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120013195 and 13120013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120013281) 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, 299451 + ... + 340456.

It is an arithmetic number, because the mean of its divisors is an integer number (979059240).

Almost surely, 2^13120013221 is an apocalyptic number.

It is an amenable number.

13120013221 is a deficient number, since it is larger than the sum of its proper divisors (2544934619).

13120013221 is a wasteful number, since it uses less digits than its factorization.

13120013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640044.

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

Adding to 13120013221 its reverse (12231002131), we get a palindrome (25351015352).

The spelling of 13120013221 in words is "thirteen billion, one hundred twenty million, thirteen thousand, two hundred twenty-one".