50100221 has 2 divisors, whose sum is σ = 50100222. Its totient is φ = 50100220.

The previous prime is 50100191. The next prime is 50100223. The reversal of 50100221 is 12200105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36120100 + 13980121 = 6010^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 50100221 - 2⁶ = 50100157 is a prime.

Together with 50100223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50100223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25050110 + 25050111.

It is an arithmetic number, because the mean of its divisors is an integer number (25050111).

Almost surely, 2^50100221 is an apocalyptic number.

It is an amenable number.

50100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

50100221 is an equidigital number, since it uses as much as digits as its factorization.

50100221 is an evil number, because the sum of its binary digits is even.

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

The square root of 50100221 is about 7078.1509591135. The cubic root of 50100221 is about 368.6491304682.

Adding to 50100221 its reverse (12200105), we get a palindrome (62300326).

The spelling of 50100221 in words is "fifty million, one hundred thousand, two hundred twenty-one".