501200021 has 8 divisors (see below), whose sum is σ = 573034560. Its totient is φ = 429424128.

The previous prime is 501200017. The next prime is 501200071. The reversal of 501200021 is 120002105.

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

It is not a de Polignac number, because 501200021 - 2² = 501200017 is a prime.

It is a super-2 number, since 2×501200021² = 502402922100800882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 501199975 and 501200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501200071) 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 7 ways as a sum of consecutive naturals, for example, 5510 + ... + 32136.

It is an arithmetic number, because the mean of its divisors is an integer number (71629320).

Almost surely, 2^501200021 is an apocalyptic number.

It is an amenable number.

501200021 is a deficient number, since it is larger than the sum of its proper divisors (71834539).

501200021 is a wasteful number, since it uses less digits than its factorization.

501200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29323.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 501200021 is about 22387.4969793409. The cubic root of 501200021 is about 794.3349902068.

Adding to 501200021 its reverse (120002105), we get a palindrome (621202126).

The spelling of 501200021 in words is "five hundred one million, two hundred thousand, twenty-one".