500022121 has 4 divisors (see below), whose sum is σ = 501210244. Its totient is φ = 498834000.

The previous prime is 500022119. The next prime is 500022137. The reversal of 500022121 is 121220005.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182790400 + 317231721 = 13520^2 + 17811^2 .

It is a cyclic number.

It is not a de Polignac number, because 500022121 - 2¹ = 500022119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500022151) by changing a digit.

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, 593430 + ... + 594271.

It is an arithmetic number, because the mean of its divisors is an integer number (125302561).

Almost surely, 2^500022121 is an apocalyptic number.

It is an amenable number.

500022121 is a deficient number, since it is larger than the sum of its proper divisors (1188123).

500022121 is a wasteful number, since it uses less digits than its factorization.

500022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188122.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 500022121 is about 22361.1744101243. The cubic root of 500022121 is about 793.7122307777.

Adding to 500022121 its reverse (121220005), we get a palindrome (621242126).

The spelling of 500022121 in words is "five hundred million, twenty-two thousand, one hundred twenty-one".