50209121 has 4 divisors (see below), whose sum is σ = 51940500. Its totient is φ = 48477744.

The previous prime is 50209099. The next prime is 50209123. The reversal of 50209121 is 12190205.

50209121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13424896 + 36784225 = 3664^2 + 6065^2 .

It is a cyclic number.

It is not a de Polignac number, because 50209121 - 2¹⁸ = 49946977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50209093 and 50209102.

It is not an unprimeable number, because it can be changed into a prime (50209123) 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 3 ways as a sum of consecutive naturals, for example, 865646 + ... + 865703.

It is an arithmetic number, because the mean of its divisors is an integer number (12985125).

Almost surely, 2^50209121 is an apocalyptic number.

It is an amenable number.

50209121 is a deficient number, since it is larger than the sum of its proper divisors (1731379).

50209121 is a wasteful number, since it uses less digits than its factorization.

50209121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731378.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 50209121 is about 7085.8394703803. The cubic root of 50209121 is about 368.9160410525.

Adding to 50209121 its reverse (12190205), we get a palindrome (62399326).

It can be divided in two parts, 5020 and 9121, that added together give a palindrome (14141).

The spelling of 50209121 in words is "fifty million, two hundred nine thousand, one hundred twenty-one".