205241024121 has 12 divisors (see below), whose sum is σ = 318333017232. Its totient is φ = 117280585128.

The previous prime is 205241024111. The next prime is 205241024143. The reversal of 205241024121 is 121420142502.

It is not a de Polignac number, because 205241024121 - 2⁷ = 205241023993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205241024091 and 205241024100.

It is not an unprimeable number, because it can be changed into a prime (205241024111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698098575 + ... + 698098868.

It is an arithmetic number, because the mean of its divisors is an integer number (26527751436).

Almost surely, 2^205241024121 is an apocalyptic number.

205241024121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

205241024121 is a deficient number, since it is larger than the sum of its proper divisors (113091993111).

205241024121 is a wasteful number, since it uses less digits than its factorization.

205241024121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396197460 (or 1396197453 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 205241024121 its reverse (121420142502), we get a palindrome (326661166623).

The spelling of 205241024121 in words is "two hundred five billion, two hundred forty-one million, twenty-four thousand, one hundred twenty-one".