131212839261569 has 8 divisors (see below), whose sum is σ = 143622628599912. Its totient is φ = 119133977639040.

The previous prime is 131212839261541. The next prime is 131212839261589. The reversal of 131212839261569 is 965162938212131.

It can be written as a sum of positive squares in 4 ways, for example, as 11883105107344 + 119329734154225 = 3447188^2 + 10923815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131212839261569 - 2¹² = 131212839257473 is a prime.

It is a super-2 number, since 2×131212839261569² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131212839261589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82731928124 + ... + 82731929709.

It is an arithmetic number, because the mean of its divisors is an integer number (17952828574989).

Almost surely, 2^{131212839261569} is an apocalyptic number.

It is an amenable number.

131212839261569 is a deficient number, since it is larger than the sum of its proper divisors (12409789338343).

131212839261569 is a wasteful number, since it uses less digits than its factorization.

131212839261569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165463857907.

The product of its digits is 8398080, while the sum is 59.

The spelling of 131212839261569 in words is "one hundred thirty-one trillion, two hundred twelve billion, eight hundred thirty-nine million, two hundred sixty-one thousand, five hundred sixty-nine".