131331020009 has 4 divisors (see below), whose sum is σ = 150092594304. Its totient is φ = 112569445716.

The previous prime is 131331019979. The next prime is 131331020011. The reversal of 131331020009 is 900020133131.

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 131331020009 - 2⁸ = 131331019753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131331020309) 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, 9380787137 + ... + 9380787150.

It is an arithmetic number, because the mean of its divisors is an integer number (37523148576).

Almost surely, 2^131331020009 is an apocalyptic number.

It is an amenable number.

131331020009 is a deficient number, since it is larger than the sum of its proper divisors (18761574295).

131331020009 is an equidigital number, since it uses as much as digits as its factorization.

131331020009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18761574294.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 131331020009 in words is "one hundred thirty-one billion, three hundred thirty-one million, twenty thousand, nine".