130011721 has 8 divisors (see below), whose sum is σ = 150678144. Its totient is φ = 109868640.

The previous prime is 130011667. The next prime is 130011743. The reversal of 130011721 is 127110031.

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

It is not a de Polignac number, because 130011721 - 2⁷ = 130011593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130011695 and 130011704.

It is not an unprimeable number, because it can be changed into a prime (130011221) 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 7 ways as a sum of consecutive naturals, for example, 130300 + ... + 131293.

It is an arithmetic number, because the mean of its divisors is an integer number (18834768).

Almost surely, 2^130011721 is an apocalyptic number.

It is an amenable number.

130011721 is a deficient number, since it is larger than the sum of its proper divisors (20666423).

130011721 is an equidigital number, since it uses as much as digits as its factorization.

130011721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261671.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 130011721 is about 11402.2682392584. The cubic root of 130011721 is about 506.5949261210.

Adding to 130011721 its reverse (127110031), we get a palindrome (257121752).

The spelling of 130011721 in words is "one hundred thirty million, eleven thousand, seven hundred twenty-one".