130520721263 has 4 divisors (see below), whose sum is σ = 130562571360. Its totient is φ = 130478871168.

The previous prime is 130520721251. The next prime is 130520721271. The reversal of 130520721263 is 362127025031.

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

It is a cyclic number.

It is not a de Polignac number, because 130520721263 - 2¹² = 130520717167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130520711263) 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, 20920370 + ... + 20926607.

It is an arithmetic number, because the mean of its divisors is an integer number (32640642840).

Almost surely, 2^130520721263 is an apocalyptic number.

130520721263 is a deficient number, since it is larger than the sum of its proper divisors (41850097).

130520721263 is an equidigital number, since it uses as much as digits as its factorization.

130520721263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41850096.

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 130520721263 its reverse (362127025031), we get a palindrome (492647746294).

The spelling of 130520721263 in words is "one hundred thirty billion, five hundred twenty million, seven hundred twenty-one thousand, two hundred sixty-three".