521061121 has 16 divisors (see below), whose sum is σ = 617679360. Its totient is φ = 430228800.

The previous prime is 521061109. The next prime is 521061137. The reversal of 521061121 is 121160125.

It is a cyclic number.

It is not a de Polignac number, because 521061121 - 2⁵ = 521061089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521061161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16200 + ... + 36118.

It is an arithmetic number, because the mean of its divisors is an integer number (38604960).

Almost surely, 2^521061121 is an apocalyptic number.

It is an amenable number.

521061121 is a deficient number, since it is larger than the sum of its proper divisors (96618239).

521061121 is a wasteful number, since it uses less digits than its factorization.

521061121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20064.

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

The square root of 521061121 is about 22826.7632615752. The cubic root of 521061121 is about 804.6917642487.

The spelling of 521061121 in words is "five hundred twenty-one million, sixty-one thousand, one hundred twenty-one".