204121421013 has 8 divisors (see below), whose sum is σ = 278491241248. Its totient is φ = 132916274064.

The previous prime is 204121420969. The next prime is 204121421017. The reversal of 204121421013 is 310124121402.

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

It is not a de Polignac number, because 204121421013 - 2⁸ = 204121420757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204121421017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791168170 + ... + 791168427.

It is an arithmetic number, because the mean of its divisors is an integer number (34811405156).

Almost surely, 2^204121421013 is an apocalyptic number.

It is an amenable number.

204121421013 is a deficient number, since it is larger than the sum of its proper divisors (74369820235).

204121421013 is a wasteful number, since it uses less digits than its factorization.

204121421013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582336643.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 204121421013 its reverse (310124121402), we get a palindrome (514245542415).

The spelling of 204121421013 in words is "two hundred four billion, one hundred twenty-one million, four hundred twenty-one thousand, thirteen".