500216121 has 16 divisors (see below), whose sum is σ = 773281920. Its totient is φ = 318978000.

The previous prime is 500216117. The next prime is 500216131. The reversal of 500216121 is 121612005.

500216121 is a `hidden beast` number, since 50 + 0 + 2 + 1 + 612 + 1 = 666.

It is not a de Polignac number, because 500216121 - 2² = 500216117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 500216094 and 500216103.

It is not an unprimeable number, because it can be changed into a prime (500216111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402130 + ... + 403371.

It is an arithmetic number, because the mean of its divisors is an integer number (48330120).

Almost surely, 2^500216121 is an apocalyptic number.

It is an amenable number.

500216121 is a deficient number, since it is larger than the sum of its proper divisors (273065799).

500216121 is a wasteful number, since it uses less digits than its factorization.

500216121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805533 (or 805527 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 500216121 is about 22365.5118653699. The cubic root of 500216121 is about 793.8148664124.

Adding to 500216121 its reverse (121612005), we get a palindrome (621828126).

The spelling of 500216121 in words is "five hundred million, two hundred sixteen thousand, one hundred twenty-one".