204121510143 has 16 divisors (see below), whose sum is σ = 273183644160. Its totient is φ = 135570403584.

The previous prime is 204121510139. The next prime is 204121510181. The reversal of 204121510143 is 341015121402.

It is not a de Polignac number, because 204121510143 - 2² = 204121510139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204121510123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4254255 + ... + 4301967.

It is an arithmetic number, because the mean of its divisors is an integer number (17073977760).

Almost surely, 2^204121510143 is an apocalyptic number.

204121510143 is a deficient number, since it is larger than the sum of its proper divisors (69062134017).

204121510143 is a wasteful number, since it uses less digits than its factorization.

204121510143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53038.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 204121510143 its reverse (341015121402), we get a palindrome (545136631545).

The spelling of 204121510143 in words is "two hundred four billion, one hundred twenty-one million, five hundred ten thousand, one hundred forty-three".