131423330221 has 8 divisors (see below), whose sum is σ = 132852111224. Its totient is φ = 129996057600.

The previous prime is 131423330209. The next prime is 131423330237. The reversal of 131423330221 is 122033324131.

It can be written as a sum of positive squares in 4 ways, for example, as 20360436100 + 111062894121 = 142690^2 + 333261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131423330221 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 (131423330821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201450 + ... + 550843.

It is an arithmetic number, because the mean of its divisors is an integer number (16606513903).

Almost surely, 2^131423330221 is an apocalyptic number.

It is an amenable number.

131423330221 is a deficient number, since it is larger than the sum of its proper divisors (1428781003).

131423330221 is an equidigital number, since it uses as much as digits as its factorization.

131423330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754191.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 131423330221 its reverse (122033324131), we get a palindrome (253456654352).

The spelling of 131423330221 in words is "one hundred thirty-one billion, four hundred twenty-three million, three hundred thirty thousand, two hundred twenty-one".