50513322121 has 2 divisors, whose sum is σ = 50513322122. Its totient is φ = 50513322120.

The previous prime is 50513322089. The next prime is 50513322173. The reversal of 50513322121 is 12122331505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50171072121 + 342250000 = 223989^2 + 18500^2 .

It is a cyclic number.

It is not a de Polignac number, because 50513322121 - 2⁵ = 50513322089 is a prime.

It is not a weakly prime, because it can be changed into another prime (50513322421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25256661060 + 25256661061.

It is an arithmetic number, because the mean of its divisors is an integer number (25256661061).

Almost surely, 2^50513322121 is an apocalyptic number.

It is an amenable number.

50513322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

50513322121 is an equidigital number, since it uses as much as digits as its factorization.

50513322121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 50513322121 its reverse (12122331505), we get a palindrome (62635653626).

The spelling of 50513322121 in words is "fifty billion, five hundred thirteen million, three hundred twenty-two thousand, one hundred twenty-one".