131321003221 has 4 divisors (see below), whose sum is σ = 131717743744. Its totient is φ = 130924262700.

The previous prime is 131321003201. The next prime is 131321003237. The reversal of 131321003221 is 122300123131.

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 131321003221 - 2¹⁷ = 131320872149 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 (131321003201) 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 3 ways as a sum of consecutive naturals, for example, 198369765 + ... + 198370426.

It is an arithmetic number, because the mean of its divisors is an integer number (32929435936).

Almost surely, 2^131321003221 is an apocalyptic number.

It is an amenable number.

131321003221 is a deficient number, since it is larger than the sum of its proper divisors (396740523).

131321003221 is an equidigital number, since it uses as much as digits as its factorization.

131321003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396740522.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 131321003221 its reverse (122300123131), we get a palindrome (253621126352).

The spelling of 131321003221 in words is "one hundred thirty-one billion, three hundred twenty-one million, three thousand, two hundred twenty-one".