13130223241221 has 24 divisors (see below), whose sum is σ = 20192465553624. Its totient is φ = 8193054458880.

The previous prime is 13130223241199. The next prime is 13130223241241. The reversal of 13130223241221 is 12214232203131.

13130223241221 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 0 + 223 + 2 + 412 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 682656012900 + 12447567228321 = 826230^2 + 3528111^2 .

It is not a de Polignac number, because 13130223241221 - 2⁹ = 13130223240709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13130223241241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237039856 + ... + 237095241.

It is an arithmetic number, because the mean of its divisors is an integer number (841352731401).

Almost surely, 2^{13130223241221} is an apocalyptic number.

It is an amenable number.

13130223241221 is a deficient number, since it is larger than the sum of its proper divisors (7062242312403).

13130223241221 is a wasteful number, since it uses less digits than its factorization.

13130223241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474135301 (or 474135298 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 13130223241221 its reverse (12214232203131), we get a palindrome (25344455444352).

The spelling of 13130223241221 in words is "thirteen trillion, one hundred thirty billion, two hundred twenty-three million, two hundred forty-one thousand, two hundred twenty-one".