520391039112221 has 4 divisors (see below), whose sum is σ = 520502257548000. Its totient is φ = 520279820676444.

The previous prime is 520391039112151. The next prime is 520391039112277. The reversal of 520391039112221 is 122211930193025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520391039112221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520391039112821) 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, 55609210871 + ... + 55609220228.

It is an arithmetic number, because the mean of its divisors is an integer number (130125564387000).

Almost surely, 2^{520391039112221} is an apocalyptic number.

It is an amenable number.

520391039112221 is a deficient number, since it is larger than the sum of its proper divisors (111218435779).

520391039112221 is a wasteful number, since it uses less digits than its factorization.

520391039112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111218435778.

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 520391039112221 in words is "five hundred twenty trillion, three hundred ninety-one billion, thirty-nine million, one hundred twelve thousand, two hundred twenty-one".