50111112121 has 4 divisors (see below), whose sum is σ = 57269842432. Its totient is φ = 42952381812.

The previous prime is 50111112119. The next prime is 50111112173. The reversal of 50111112121 is 12121111105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12121111105 = 5 ⋅2424222221.

It is a cyclic number.

It is not a de Polignac number, because 50111112121 - 2¹ = 50111112119 is a prime.

It is a super-2 number, since 2×50111112121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50111112095 and 50111112104.

It is not an unprimeable number, because it can be changed into a prime (50111112521) 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, 3579365145 + ... + 3579365158.

It is an arithmetic number, because the mean of its divisors is an integer number (14317460608).

Almost surely, 2^50111112121 is an apocalyptic number.

It is an amenable number.

50111112121 is a deficient number, since it is larger than the sum of its proper divisors (7158730311).

50111112121 is an equidigital number, since it uses as much as digits as its factorization.

50111112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158730310.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 50111112121 its reverse (12121111105), we get a palindrome (62232223226).

The spelling of 50111112121 in words is "fifty billion, one hundred eleven million, one hundred twelve thousand, one hundred twenty-one".