204450121 has 4 divisors (see below), whose sum is σ = 204484500. Its totient is φ = 204415744.

The previous prime is 204450119. The next prime is 204450131. The reversal of 204450121 is 121054402.

204450121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58982400 + 145467721 = 7680^2 + 12061^2 .

It is a cyclic number.

It is not a de Polignac number, because 204450121 - 2¹ = 204450119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204450131) 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, 5716 + ... + 21013.

It is an arithmetic number, because the mean of its divisors is an integer number (51121125).

Almost surely, 2^204450121 is an apocalyptic number.

It is an amenable number.

204450121 is a deficient number, since it is larger than the sum of its proper divisors (34379).

204450121 is an equidigital number, since it uses as much as digits as its factorization.

204450121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34378.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 204450121 is about 14298.6055613826. The cubic root of 204450121 is about 589.1091804142.

The spelling of 204450121 in words is "two hundred four million, four hundred fifty thousand, one hundred twenty-one".