131320120009 has 4 divisors (see below), whose sum is σ = 141421667716. Its totient is φ = 121218572304.

The previous prime is 131320119977. The next prime is 131320120027. The reversal of 131320120009 is 900021023131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30611001600 + 100709118409 = 174960^2 + 317347^2 .

It is a cyclic number.

It is not a de Polignac number, because 131320120009 - 2⁵ = 131320119977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131320120069) 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, 5050773834 + ... + 5050773859.

It is an arithmetic number, because the mean of its divisors is an integer number (35355416929).

Almost surely, 2^131320120009 is an apocalyptic number.

It is an amenable number.

131320120009 is a deficient number, since it is larger than the sum of its proper divisors (10101547707).

131320120009 is a wasteful number, since it uses less digits than its factorization.

131320120009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101547706.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 131320120009 in words is "one hundred thirty-one billion, three hundred twenty million, one hundred twenty thousand, nine".