130131123220321 has 4 divisors (see below), whose sum is σ = 133648180604692. Its totient is φ = 126614065835952.

The previous prime is 130131123220279. The next prime is 130131123220327. The reversal of 130131123220321 is 123022321131031.

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 99911519580625 + 30219603639696 = 9995575^2 + 5497236^2 .

It is a cyclic number.

It is not a de Polignac number, because 130131123220321 - 2¹⁹ = 130131122696033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (130131123220327) 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, 1758528692130 + ... + 1758528692203.

It is an arithmetic number, because the mean of its divisors is an integer number (33412045151173).

Almost surely, 2^{130131123220321} is an apocalyptic number.

It is an amenable number.

130131123220321 is a deficient number, since it is larger than the sum of its proper divisors (3517057384371).

130131123220321 is an equidigital number, since it uses as much as digits as its factorization.

130131123220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517057384370.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 130131123220321 its reverse (123022321131031), we get a palindrome (253153444351352).

The spelling of 130131123220321 in words is "one hundred thirty trillion, one hundred thirty-one billion, one hundred twenty-three million, two hundred twenty thousand, three hundred twenty-one".