50499984121 has 4 divisors (see below), whose sum is σ = 51020602612. Its totient is φ = 49979365632.

The previous prime is 50499984103. The next prime is 50499984149. The reversal of 50499984121 is 12148999405.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12148999405 = 5 ⋅2429799881.

It can be written as a sum of positive squares in 2 ways, for example, as 36235026025 + 14264958096 = 190355^2 + 119436^2 .

It is a cyclic number.

It is not a de Polignac number, because 50499984121 - 2¹⁷ = 50499853049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50499984181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260309100 + ... + 260309293.

It is an arithmetic number, because the mean of its divisors is an integer number (12755150653).

Almost surely, 2^50499984121 is an apocalyptic number.

It is an amenable number.

50499984121 is a deficient number, since it is larger than the sum of its proper divisors (520618491).

50499984121 is an equidigital number, since it uses as much as digits as its factorization.

50499984121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520618490.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 50499984121 in words is "fifty billion, four hundred ninety-nine million, nine hundred eighty-four thousand, one hundred twenty-one".