20130440421321 has 24 divisors (see below), whose sum is σ = 29889911594504. Its totient is φ = 13045892866560.

The previous prime is 20130440421313. The next prime is 20130440421347. The reversal of 20130440421321 is 12312404403102.

20130440421321 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 0 + 440 + 4 + 213 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8619273939600 + 11511166481721 = 2935860^2 + 3392811^2 .

It is not a de Polignac number, because 20130440421321 - 2³ = 20130440421313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20130440421821) 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, 26687920 + ... + 27431841.

Almost surely, 2^{20130440421321} is an apocalyptic number.

It is an amenable number.

20130440421321 is a deficient number, since it is larger than the sum of its proper divisors (9759471173183).

20130440421321 is a wasteful number, since it uses less digits than its factorization.

20130440421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54120921 (or 54120918 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20130440421321 its reverse (12312404403102), we get a palindrome (32442844824423).

The spelling of 20130440421321 in words is "twenty trillion, one hundred thirty billion, four hundred forty million, four hundred twenty-one thousand, three hundred twenty-one".