130721601923 has 8 divisors (see below), whose sum is σ = 143549792256. Its totient is φ = 118050813000.

The previous prime is 130721601919. The next prime is 130721601931. The reversal of 130721601923 is 329106127031.

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

It is a cyclic number.

It is not a de Polignac number, because 130721601923 - 2² = 130721601919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130721601943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39348611 + ... + 39351932.

It is an arithmetic number, because the mean of its divisors is an integer number (17943724032).

Almost surely, 2^130721601923 is an apocalyptic number.

130721601923 is a deficient number, since it is larger than the sum of its proper divisors (12828190333).

130721601923 is a wasteful number, since it uses less digits than its factorization.

130721601923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78700705.

The product of its (nonzero) digits is 13608, while the sum is 35.

Adding to 130721601923 its reverse (329106127031), we get a palindrome (459827728954).

The spelling of 130721601923 in words is "one hundred thirty billion, seven hundred twenty-one million, six hundred one thousand, nine hundred twenty-three".