521121004244 has 12 divisors (see below), whose sum is σ = 959959744800. Its totient is φ = 246846791448.

The previous prime is 521121004237. The next prime is 521121004267. The reversal of 521121004244 is 442400121125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3428427584 + ... + 3428427735.

It is an arithmetic number, because the mean of its divisors is an integer number (79996645400).

Almost surely, 2^521121004244 is an apocalyptic number.

It is an amenable number.

521121004244 is a deficient number, since it is larger than the sum of its proper divisors (438838740556).

521121004244 is a wasteful number, since it uses less digits than its factorization.

521121004244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6856855342 (or 6856855340 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 521121004244 its reverse (442400121125), we get a palindrome (963521125369).

The spelling of 521121004244 in words is "five hundred twenty-one billion, one hundred twenty-one million, four thousand, two hundred forty-four".