501230121 has 16 divisors (see below), whose sum is σ = 766627200. Its totient is φ = 285349248.

The previous prime is 501230003. The next prime is 501230129. The reversal of 501230121 is 121032105.

It is not a de Polignac number, because 501230121 - 2⁹ = 501229609 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 501230121.

It is not an unprimeable number, because it can be changed into a prime (501230129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38716 + ... + 50013.

It is an arithmetic number, because the mean of its divisors is an integer number (47914200).

Almost surely, 2^501230121 is an apocalyptic number.

It is an amenable number.

501230121 is a deficient number, since it is larger than the sum of its proper divisors (265397079).

501230121 is a wasteful number, since it uses less digits than its factorization.

501230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89008.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 501230121 is about 22388.1692194784. The cubic root of 501230121 is about 794.3508913797.

Adding to 501230121 its reverse (121032105), we get a palindrome (622262226).

The spelling of 501230121 in words is "five hundred one million, two hundred thirty thousand, one hundred twenty-one".