50013121 has 4 divisors (see below), whose sum is σ = 50138244. Its totient is φ = 49888000.

The previous prime is 50013113. The next prime is 50013151. The reversal of 50013121 is 12131005.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24611521 + 25401600 = 4961^2 + 5040^2 .

It is a cyclic number.

It is not a de Polignac number, because 50013121 - 2³ = 50013113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50013101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61960 + ... + 62761.

It is an arithmetic number, because the mean of its divisors is an integer number (12534561).

Almost surely, 2^50013121 is an apocalyptic number.

It is an amenable number.

50013121 is a deficient number, since it is larger than the sum of its proper divisors (125123).

50013121 is a wasteful number, since it uses less digits than its factorization.

50013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125122.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 50013121 is about 7071.9955458131. The cubic root of 50013121 is about 368.4353724971.

Adding to 50013121 its reverse (12131005), we get a palindrome (62144126).

The spelling of 50013121 in words is "fifty million, thirteen thousand, one hundred twenty-one".