130979571921 has 45 divisors (see below), whose sum is σ = 208319640555. Its totient is φ = 79301938320.

The previous prime is 130979571889. The next prime is 130979571923. The reversal of 130979571921 is 129175979031.

The square root of 130979571921 is 361911.

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., 112744850625 + 18234721296 = 335775^2 + 135036^2 .

It is not a de Polignac number, because 130979571921 - 2⁵ = 130979571889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (130979571923) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 131373195 + ... + 131374191.

Almost surely, 2^130979571921 is an apocalyptic number.

130979571921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

130979571921 is the 361911-st square number.

130979571921 is the 180956-th centered octagonal number.

It is an amenable number.

130979571921 is a deficient number, since it is larger than the sum of its proper divisors (77340068634).

130979571921 is an frugal number, since it uses more digits than its factorization.

130979571921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 1071630, while the sum is 54.

The spelling of 130979571921 in words is "one hundred thirty billion, nine hundred seventy-nine million, five hundred seventy-one thousand, nine hundred twenty-one".