521001516012 has 48 divisors (see below), whose sum is σ = 1216885874400. Its totient is φ = 173493606400.

The previous prime is 521001515981. The next prime is 521001516137. The reversal of 521001516012 is 210615100125.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65937262 + ... + 65945162.

It is an arithmetic number, because the mean of its divisors is an integer number (25351789050).

Almost surely, 2^521001516012 is an apocalyptic number.

It is an amenable number.

521001516012 is an abundant number, since it is smaller than the sum of its proper divisors (695884358388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521001516012 is a wasteful number, since it uses less digits than its factorization.

521001516012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12706 (or 12704 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 521001516012 its reverse (210615100125), we get a palindrome (731616616137).

The spelling of 521001516012 in words is "five hundred twenty-one billion, one million, five hundred sixteen thousand, twelve".