131002442103209 has 4 divisors (see below), whose sum is σ = 131065393783380. Its totient is φ = 130939490423040.

The previous prime is 131002442103163. The next prime is 131002442103251. The reversal of 131002442103209 is 902301244200131.

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 67197940579225 + 63804501523984 = 8197435^2 + 7987772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131002442103209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131002442103409) 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, 31475836964 + ... + 31475841125.

It is an arithmetic number, because the mean of its divisors is an integer number (32766348445845).

Almost surely, 2^{131002442103209} is an apocalyptic number.

It is an amenable number.

131002442103209 is a deficient number, since it is larger than the sum of its proper divisors (62951680171).

131002442103209 is an equidigital number, since it uses as much as digits as its factorization.

131002442103209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62951680170.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 131002442103209 in words is "one hundred thirty-one trillion, two billion, four hundred forty-two million, one hundred three thousand, two hundred nine".