13221532303461 has 6 divisors (see below), whose sum is σ = 19097768882790. Its totient is φ = 8814354868968.

The previous prime is 13221532303451. The next prime is 13221532303487. The reversal of 13221532303461 is 16430323512231.

13221532303461 is a `hidden beast` number, since 1 + 3 + 2 + 2 + 1 + 532 + 30 + 34 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11492649186561 + 1728883116900 = 3390081^2 + 1314870^2 .

It is not a de Polignac number, because 13221532303461 - 2²¹ = 13221530206309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221532303451) 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, 734529572406 + ... + 734529572423.

It is an arithmetic number, because the mean of its divisors is an integer number (3182961480465).

Almost surely, 2^{13221532303461} is an apocalyptic number.

It is an amenable number.

13221532303461 is a deficient number, since it is larger than the sum of its proper divisors (5876236579329).

13221532303461 is a wasteful number, since it uses less digits than its factorization.

13221532303461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469059144835 (or 1469059144832 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 13221532303461 its reverse (16430323512231), we get a palindrome (29651855815692).

The spelling of 13221532303461 in words is "thirteen trillion, two hundred twenty-one billion, five hundred thirty-two million, three hundred three thousand, four hundred sixty-one".