500021121 has 16 divisors (see below), whose sum is σ = 676988928. Its totient is φ = 328213200.

The previous prime is 500021113. The next prime is 500021147. The reversal of 500021121 is 121120005.

It is not a de Polignac number, because 500021121 - 2³ = 500021113 is a prime.

It is a super-2 number, since 2×500021121² = 500042242892193282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 500021097 and 500021106.

It is not an unprimeable number, because it can be changed into a prime (500021191) 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 15 ways as a sum of consecutive naturals, for example, 261250 + ... + 263156.

It is an arithmetic number, because the mean of its divisors is an integer number (42311808).

Almost surely, 2^500021121 is an apocalyptic number.

It is an amenable number.

500021121 is a deficient number, since it is larger than the sum of its proper divisors (176967807).

500021121 is a wasteful number, since it uses less digits than its factorization.

500021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 500021121 is about 22361.1520499280. The cubic root of 500021121 is about 793.7117016593.

Adding to 500021121 its reverse (121120005), we get a palindrome (621141126).

The spelling of 500021121 in words is "five hundred million, twenty-one thousand, one hundred twenty-one".