521052121052 has 12 divisors (see below), whose sum is σ = 916162735656. Its totient is φ = 259291339440.

The previous prime is 521052121003. The next prime is 521052121067. The reversal of 521052121052 is 250121250125.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308679323 + ... + 308681010.

It is an arithmetic number, because the mean of its divisors is an integer number (76346894638).

Almost surely, 2^521052121052 is an apocalyptic number.

It is an amenable number.

521052121052 is a deficient number, since it is larger than the sum of its proper divisors (395110614604).

521052121052 is a wasteful number, since it uses less digits than its factorization.

521052121052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617360548 (or 617360546 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 521052121052 its reverse (250121250125), we get a palindrome (771173371177).

The spelling of 521052121052 in words is "five hundred twenty-one billion, fifty-two million, one hundred twenty-one thousand, fifty-two".