520442332121 has 4 divisors (see below), whose sum is σ = 520459394532. Its totient is φ = 520425269712.

The previous prime is 520442332087. The next prime is 520442332139. The reversal of 520442332121 is 121233244025.

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 27245133721 + 493197198400 = 165061^2 + 702280^2 .

It is a cyclic number.

It is not a de Polignac number, because 520442332121 - 2¹⁴ = 520442315737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520442332321) 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, 8485370 + ... + 8546483.

It is an arithmetic number, because the mean of its divisors is an integer number (130114848633).

Almost surely, 2^520442332121 is an apocalyptic number.

It is an amenable number.

520442332121 is a deficient number, since it is larger than the sum of its proper divisors (17062411).

520442332121 is a wasteful number, since it uses less digits than its factorization.

520442332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17062410.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 520442332121 its reverse (121233244025), we get a palindrome (641675576146).

The spelling of 520442332121 in words is "five hundred twenty billion, four hundred forty-two million, three hundred thirty-two thousand, one hundred twenty-one".