520312021111 has 8 divisors (see below), whose sum is σ = 521439055200. Its totient is φ = 519185355552.

The previous prime is 520312021093. The next prime is 520312021121. The reversal of 520312021111 is 111120213025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520312021111 - 2¹³ = 520312012919 is a prime.

It is a super-2 number, since 2×520312021111² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520312021121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2834965 + ... + 3012913.

It is an arithmetic number, because the mean of its divisors is an integer number (65179881900).

Almost surely, 2^520312021111 is an apocalyptic number.

520312021111 is a deficient number, since it is larger than the sum of its proper divisors (1127034089).

520312021111 is a wasteful number, since it uses less digits than its factorization.

520312021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184265.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 520312021111 its reverse (111120213025), we get a palindrome (631432234136).

The spelling of 520312021111 in words is "five hundred twenty billion, three hundred twelve million, twenty-one thousand, one hundred eleven".