2131206271705 has 12 divisors (see below), whose sum is σ = 2974989979620. Its totient is φ = 1461398586144.

The previous prime is 2131206271699. The next prime is 2131206271723. The reversal of 2131206271705 is 5071726021312.

It can be written as a sum of positive squares in 2 ways, for example, as 393098904576 + 1738107367129 = 626976^2 + 1318373^2 .

It is not a de Polignac number, because 2131206271705 - 2³ = 2131206271697 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4349400310 + ... + 4349400799.

It is an arithmetic number, because the mean of its divisors is an integer number (247915831635).

Almost surely, 2^{2131206271705} is an apocalyptic number.

It is an amenable number.

2131206271705 is a deficient number, since it is larger than the sum of its proper divisors (843783707915).

2131206271705 is an equidigital number, since it uses as much as digits as its factorization.

2131206271705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8698801128 (or 8698801121 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 2131206271705 in words is "two trillion, one hundred thirty-one billion, two hundred six million, two hundred seventy-one thousand, seven hundred five".