130720821055 has 64 divisors (see below), whose sum is σ = 178246987776. Its totient is φ = 91212480000.

The previous prime is 130720820851. The next prime is 130720821089. The reversal of 130720821055 is 550128027031.

It is not a de Polignac number, because 130720821055 - 2¹¹ = 130720819007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130720821055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26889325 + ... + 26894185.

It is an arithmetic number, because the mean of its divisors is an integer number (2785109184).

Almost surely, 2^130720821055 is an apocalyptic number.

130720821055 is a deficient number, since it is larger than the sum of its proper divisors (47526166721).

130720821055 is a wasteful number, since it uses less digits than its factorization.

130720821055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128.

The product of its (nonzero) digits is 16800, while the sum is 34.

Adding to 130720821055 its reverse (550128027031), we get a palindrome (680848848086).

The spelling of 130720821055 in words is "one hundred thirty billion, seven hundred twenty million, eight hundred twenty-one thousand, fifty-five".