131004204321 has 4 divisors (see below), whose sum is σ = 174672272432. Its totient is φ = 87336136212.

The previous prime is 131004204307. The next prime is 131004204343. The reversal of 131004204321 is 123402400131.

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 not a de Polignac number, because 131004204321 - 2⁶ = 131004204257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131004204361) 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, 21834034051 + ... + 21834034056.

It is an arithmetic number, because the mean of its divisors is an integer number (43668068108).

Almost surely, 2^131004204321 is an apocalyptic number.

It is an amenable number.

131004204321 is a deficient number, since it is larger than the sum of its proper divisors (43668068111).

131004204321 is an equidigital number, since it uses as much as digits as its factorization.

131004204321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43668068110.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 131004204321 its reverse (123402400131), we get a palindrome (254406604452).

The spelling of 131004204321 in words is "one hundred thirty-one billion, four million, two hundred four thousand, three hundred twenty-one".