50402121 has 16 divisors (see below), whose sum is σ = 83785728. Its totient is φ = 26182800.

The previous prime is 50402111. The next prime is 50402137. The reversal of 50402121 is 12120405.

It is not a de Polignac number, because 50402121 - 2¹¹ = 50400073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50402121.

It is not an unprimeable number, because it can be changed into a prime (50402111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108865 + ... + 109326.

It is an arithmetic number, because the mean of its divisors is an integer number (5236608).

Almost surely, 2^50402121 is an apocalyptic number.

It is an amenable number.

50402121 is a deficient number, since it is larger than the sum of its proper divisors (33383607).

50402121 is a wasteful number, since it uses less digits than its factorization.

50402121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218212.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 50402121 is about 7099.4451191625. The cubic root of 50402121 is about 369.3881316388.

Adding to 50402121 its reverse (12120405), we get a palindrome (62522526).

The spelling of 50402121 in words is "fifty million, four hundred two thousand, one hundred twenty-one".