504212121 has 28 divisors (see below), whose sum is σ = 863977152. Its totient is φ = 288118296.

The previous prime is 504212087. The next prime is 504212131. The reversal of 504212121 is 121212405.

It is not a de Polignac number, because 504212121 - 2¹³ = 504203929 is a prime.

504212121 is a modest number, since divided by 212121 gives 504 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 504212094 and 504212103.

It is not an unprimeable number, because it can be changed into a prime (504212131) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 44301 + ... + 54506.

Almost surely, 2^504212121 is an apocalyptic number.

It is an amenable number.

504212121 is a deficient number, since it is larger than the sum of its proper divisors (359765031).

504212121 is an frugal number, since it uses more digits than its factorization.

504212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98832 (or 98817 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 504212121 is about 22454.6681338202. The cubic root of 504212121 is about 795.9230716335.

Adding to 504212121 its reverse (121212405), we get a palindrome (625424526).

The spelling of 504212121 in words is "five hundred four million, two hundred twelve thousand, one hundred twenty-one".