204121 has 8 divisors (see below), whose sum is σ = 215424. Its totient is φ = 193200.

The previous prime is 204107. The next prime is 204133. The reversal of 204121 is 121402.

204121 = T₆ + T₇ + ... + T₁₀₆.

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

It is a cyclic number.

It is not a de Polignac number, because 204121 - 2¹³ = 195929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204098 and 204107.

It is not an unprimeable number, because it can be changed into a prime (204101) 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, 1971 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (26928).

2²⁰⁴¹²¹ is an apocalyptic number.

It is an amenable number.

204121 is a deficient number, since it is larger than the sum of its proper divisors (11303).

204121 is a wasteful number, since it uses less digits than its factorization.

204121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 204121 is about 451.7975210202. The cubic root of 204121 is about 58.8792897345.

Multiplying 204121 by its sum of digits (10), we get a triangular number (2041210 = T₂₀₂₀).

Adding to 204121 its reverse (121402), we get a palindrome (325523).

It can be divided in two parts, 204 and 121, that added together give a triangular number (325 = T₂₅).

The spelling of 204121 in words is "two hundred four thousand, one hundred twenty-one", and thus it is an iban number.