520121121113 has 4 divisors (see below), whose sum is σ = 567404859408. Its totient is φ = 472837382820.

The previous prime is 520121121067. The next prime is 520121121133. The reversal of 520121121113 is 311121121025.

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 not a de Polignac number, because 520121121113 - 2¹² = 520121117017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520121121133) 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, 23641869131 + ... + 23641869152.

It is an arithmetic number, because the mean of its divisors is an integer number (141851214852).

Almost surely, 2^520121121113 is an apocalyptic number.

It is an amenable number.

520121121113 is a deficient number, since it is larger than the sum of its proper divisors (47283738295).

520121121113 is a wasteful number, since it uses less digits than its factorization.

520121121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47283738294.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 520121121113 its reverse (311121121025), we get a palindrome (831242242138).

The spelling of 520121121113 in words is "five hundred twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred thirteen".