3941243205121 has 4 divisors (see below), whose sum is σ = 3954694547412. Its totient is φ = 3927791862832.

The previous prime is 3941243205079. The next prime is 3941243205139. The reversal of 3941243205121 is 1215023421493.

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 2159915212225 + 1781327992896 = 1469665^2 + 1334664^2 .

It is a cyclic number.

It is not a de Polignac number, because 3941243205121 - 2⁷ = 3941243204993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3941243205181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6725670706 + ... + 6725671291.

It is an arithmetic number, because the mean of its divisors is an integer number (988673636853).

Almost surely, 2^{3941243205121} is an apocalyptic number.

It is an amenable number.

3941243205121 is a deficient number, since it is larger than the sum of its proper divisors (13451342291).

3941243205121 is a wasteful number, since it uses less digits than its factorization.

3941243205121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13451342290.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 3941243205121 in words is "three trillion, nine hundred forty-one billion, two hundred forty-three million, two hundred five thousand, one hundred twenty-one".