205041340421 has 8 divisors (see below), whose sum is σ = 212569870080. Its totient is φ = 197543353392.

The previous prime is 205041340403. The next prime is 205041340451. The reversal of 205041340421 is 124043140502.

205041340421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205041340421 - 2²⁶ = 204974231557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205041340451) 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 7 ways as a sum of consecutive naturals, for example, 7621985 + ... + 7648838.

It is an arithmetic number, because the mean of its divisors is an integer number (26571233760).

Almost surely, 2^205041340421 is an apocalyptic number.

It is an amenable number.

205041340421 is a deficient number, since it is larger than the sum of its proper divisors (7528529659).

205041340421 is a wasteful number, since it uses less digits than its factorization.

205041340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15271315.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 205041340421 its reverse (124043140502), we get a palindrome (329084480923).

The spelling of 205041340421 in words is "two hundred five billion, forty-one million, three hundred forty thousand, four hundred twenty-one".