130871021121 has 9 divisors (see below), whose sum is σ = 189037487041. Its totient is φ = 87246623892.

The previous prime is 130871021111. The next prime is 130871021147. The reversal of 130871021121 is 121120178031.

The square root of 130871021121 is 361761.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 130871021121 - 2¹¹ = 130871019073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130871021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1024990 + ... + 1145576.

Almost surely, 2^130871021121 is an apocalyptic number.

130871021121 is the 361761-st square number.

130871021121 is the 180881-st centered octagonal number.

It is an amenable number.

130871021121 is a deficient number, since it is larger than the sum of its proper divisors (58166465920).

130871021121 is an frugal number, since it uses more digits than its factorization.

130871021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241180 (or 120590 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

Adding to 130871021121 its reverse (121120178031), we get a palindrome (251991199152).

The spelling of 130871021121 in words is "one hundred thirty billion, eight hundred seventy-one million, twenty-one thousand, one hundred twenty-one".