50211201221 has 2 divisors, whose sum is σ = 50211201222. Its totient is φ = 50211201220.

The previous prime is 50211201217. The next prime is 50211201233. The reversal of 50211201221 is 12210211205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47824878721 + 2386322500 = 218689^2 + 48850^2 .

It is a cyclic number.

It is not a de Polignac number, because 50211201221 - 2² = 50211201217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50211201221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50211201251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25105600610 + 25105600611.

It is an arithmetic number, because the mean of its divisors is an integer number (25105600611).

Almost surely, 2^50211201221 is an apocalyptic number.

It is an amenable number.

50211201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

50211201221 is an equidigital number, since it uses as much as digits as its factorization.

50211201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 50211201221 its reverse (12210211205), we get a palindrome (62421412426).

The spelling of 50211201221 in words is "fifty billion, two hundred eleven million, two hundred one thousand, two hundred twenty-one".