12050121805857 has 12 divisors (see below), whose sum is σ = 17405816134564. Its totient is φ = 8033375473920.

The previous prime is 12050121805753. The next prime is 12050121805903. The reversal of 12050121805857 is 75850812105021.

It is a happy number.

12050121805857 is a `hidden beast` number, since 1 + 2 + 0 + 50 + 1 + 2 + 18 + 0 + 585 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8726121908001 + 3323999897856 = 2954001^2 + 1823184^2 .

It is not a de Polignac number, because 12050121805857 - 2¹⁴ = 12050121789473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12050121815857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1235644 + ... + 5062317.

Almost surely, 2^{12050121805857} is an apocalyptic number.

It is an amenable number.

12050121805857 is a deficient number, since it is larger than the sum of its proper divisors (5355694328707).

12050121805857 is a wasteful number, since it uses less digits than its factorization.

12050121805857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6510560 (or 6510557 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 45.

The spelling of 12050121805857 in words is "twelve trillion, fifty billion, one hundred twenty-one million, eight hundred five thousand, eight hundred fifty-seven".