1299871334161 has 9 divisors (see below), whose sum is σ = 1307300162043. Its totient is φ = 1292484503160.

The previous prime is 1299871334059. The next prime is 1299871334183. The reversal of 1299871334161 is 1614331789921.

The square root of 1299871334161 is 1140119.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14323541761 + 1285547792400 = 119681^2 + 1133820^2 .

It is not a de Polignac number, because 1299871334161 - 2¹¹ = 1299871332113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299851334161) 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 8 ways as a sum of consecutive naturals, for example, 206358390 + ... + 206364688.

Almost surely, 2^{1299871334161} is an apocalyptic number.

1299871334161 is the 1140119-th square number.

1299871334161 is the 570060-th centered octagonal number.

It is an amenable number.

1299871334161 is a deficient number, since it is larger than the sum of its proper divisors (7428827882).

1299871334161 is an frugal number, since it uses more digits than its factorization.

1299871334161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960 (or 6480 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 55.

The spelling of 1299871334161 in words is "one trillion, two hundred ninety-nine billion, eight hundred seventy-one million, three hundred thirty-four thousand, one hundred sixty-one".