130720821056 has 56 divisors (see below), whose sum is σ = 296795074176. Its totient is φ = 55959160320.

The previous prime is 130720820851. The next prime is 130720821089. The reversal of 130720821056 is 650128027031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226541 + ... + 559251.

Almost surely, 2^130720821056 is an apocalyptic number.

130720821056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130720821056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148397537088).

130720821056 is an abundant number, since it is smaller than the sum of its proper divisors (166074253120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130720821056 is an equidigital number, since it uses as much as digits as its factorization.

130720821056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333607 (or 333597 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

Adding to 130720821056 its reverse (650128027031), we get a palindrome (780848848087).

The spelling of 130720821056 in words is "one hundred thirty billion, seven hundred twenty million, eight hundred twenty-one thousand, fifty-six".