50121221 has 4 divisors (see below), whose sum is σ = 52759200. Its totient is φ = 47483244.

The previous prime is 50121217. The next prime is 50121233. The reversal of 50121221 is 12212105.

50121221 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50121221 - 2² = 50121217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50121196 and 50121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50121241) 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, 1318961 + ... + 1318998.

It is an arithmetic number, because the mean of its divisors is an integer number (13189800).

Almost surely, 2^50121221 is an apocalyptic number.

It is an amenable number.

50121221 is a deficient number, since it is larger than the sum of its proper divisors (2637979).

50121221 is a wasteful number, since it uses less digits than its factorization.

50121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637978.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 50121221 is about 7079.6342419648. The cubic root of 50121221 is about 368.7006309086.

Adding to 50121221 its reverse (12212105), we get a palindrome (62333326).

The spelling of 50121221 in words is "fifty million, one hundred twenty-one thousand, two hundred twenty-one".