130440330421 has 4 divisors (see below), whose sum is σ = 138113291052. Its totient is φ = 122767369792.

The previous prime is 130440330373. The next prime is 130440330511. The reversal of 130440330421 is 124033044031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102077055025 + 28363275396 = 319495^2 + 168414^2 .

It is a cyclic number.

It is not a de Polignac number, because 130440330421 - 2²⁷ = 130306112693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130440300421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3836480290 + ... + 3836480323.

It is an arithmetic number, because the mean of its divisors is an integer number (34528322763).

Almost surely, 2^130440330421 is an apocalyptic number.

It is an amenable number.

130440330421 is a deficient number, since it is larger than the sum of its proper divisors (7672960631).

130440330421 is an equidigital number, since it uses as much as digits as its factorization.

130440330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672960630.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 130440330421 its reverse (124033044031), we get a palindrome (254473374452).

The spelling of 130440330421 in words is "one hundred thirty billion, four hundred forty million, three hundred thirty thousand, four hundred twenty-one".