205121026 has 8 divisors (see below), whose sum is σ = 335652624. Its totient is φ = 93236820.

The previous prime is 205121023. The next prime is 205121039. The reversal of 205121026 is 620121502.

205121026 is digitally balanced in base 3, 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 junction number, because it is equal to n+sod(n) for n = 205120994 and 205121012.

It is not an unprimeable number, because it can be changed into a prime (205121023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4661820 + ... + 4661863.

It is an arithmetic number, because the mean of its divisors is an integer number (41956578).

Almost surely, 2^205121026 is an apocalyptic number.

205121026 is a deficient number, since it is larger than the sum of its proper divisors (130531598).

205121026 is a wasteful number, since it uses less digits than its factorization.

205121026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323696.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 205121026 is about 14322.0468509218. The cubic root of 205121026 is about 589.7528659503.

Adding to 205121026 its reverse (620121502), we get a palindrome (825242528).

The spelling of 205121026 in words is "two hundred five million, one hundred twenty-one thousand, twenty-six".