521121122 has 8 divisors (see below), whose sum is σ = 796430556. Its totient is φ = 255644272.

The previous prime is 521121121. The next prime is 521121149. The reversal of 521121122 is 221121125.

It can be written as a sum of positive squares in 2 ways, for example, as 463497841 + 57623281 = 21529^2 + 7591^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 521121122.

It is not an unprimeable number, because it can be changed into a prime (521121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2458013 + ... + 2458224.

Almost surely, 2^521121122 is an apocalyptic number.

521121122 is a deficient number, since it is larger than the sum of its proper divisors (275309434).

521121122 is a wasteful number, since it uses less digits than its factorization.

521121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916292.

The product of its digits is 80, while the sum is 17.

The square root of 521121122 is about 22828.0774924215. The cubic root of 521121122 is about 804.7226502334.

Adding to 521121122 its reverse (221121125), we get a palindrome (742242247).

The spelling of 521121122 in words is "five hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".