50221716121 has 2 divisors, whose sum is σ = 50221716122. Its totient is φ = 50221716120.

The previous prime is 50221716091. The next prime is 50221716137. The reversal of 50221716121 is 12161712205.

50221716121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27319131225 + 22902584896 = 165285^2 + 151336^2 .

It is a cyclic number.

It is not a de Polignac number, because 50221716121 - 2¹⁷ = 50221585049 is a prime.

It is a super-2 number, since 2×50221716121² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 50221716121.

It is not a weakly prime, because it can be changed into another prime (50221716221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25110858060 + 25110858061.

It is an arithmetic number, because the mean of its divisors is an integer number (25110858061).

Almost surely, 2^50221716121 is an apocalyptic number.

It is an amenable number.

50221716121 is a deficient number, since it is larger than the sum of its proper divisors (1).

50221716121 is an equidigital number, since it uses as much as digits as its factorization.

50221716121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 50221716121 in words is "fifty billion, two hundred twenty-one million, seven hundred sixteen thousand, one hundred twenty-one".