131302320221 has 4 divisors (see below), whose sum is σ = 131422671744. Its totient is φ = 131181968700.

The previous prime is 131302320217. The next prime is 131302320263. The reversal of 131302320221 is 122023203131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131302320221 - 2² = 131302320217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131302320193 and 131302320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131302320271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60174125 + ... + 60176306.

It is an arithmetic number, because the mean of its divisors is an integer number (32855667936).

Almost surely, 2^131302320221 is an apocalyptic number.

It is an amenable number.

131302320221 is a deficient number, since it is larger than the sum of its proper divisors (120351523).

131302320221 is a wasteful number, since it uses less digits than its factorization.

131302320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120351522.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 131302320221 its reverse (122023203131), we get a palindrome (253325523352).

The spelling of 131302320221 in words is "one hundred thirty-one billion, three hundred two million, three hundred twenty thousand, two hundred twenty-one".