130043120521 has 4 divisors (see below), whose sum is σ = 133557799492. Its totient is φ = 126528441552.

The previous prime is 130043120513. The next prime is 130043120539. The reversal of 130043120521 is 125021340031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110865025296 + 19178095225 = 332964^2 + 138485^2 .

It is a cyclic number.

It is not a de Polignac number, because 130043120521 - 2³ = 130043120513 is a prime.

It is a super-2 number, since 2×130043120521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130043120492 and 130043120501.

It is not an unprimeable number, because it can be changed into a prime (130043120021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757339430 + ... + 1757339503.

It is an arithmetic number, because the mean of its divisors is an integer number (33389449873).

Almost surely, 2^130043120521 is an apocalyptic number.

It is an amenable number.

130043120521 is a deficient number, since it is larger than the sum of its proper divisors (3514678971).

130043120521 is an equidigital number, since it uses as much as digits as its factorization.

130043120521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514678970.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 130043120521 its reverse (125021340031), we get a palindrome (255064460552).

The spelling of 130043120521 in words is "one hundred thirty billion, forty-three million, one hundred twenty thousand, five hundred twenty-one".