204121223 has 2 divisors, whose sum is σ = 204121224. Its totient is φ = 204121222.

The previous prime is 204121219. The next prime is 204121231. The reversal of 204121223 is 322121402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204121223 - 2² = 204121219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204121243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102060611 + 102060612.

It is an arithmetic number, because the mean of its divisors is an integer number (102060612).

Almost surely, 2^204121223 is an apocalyptic number.

204121223 is a deficient number, since it is larger than the sum of its proper divisors (1).

204121223 is an equidigital number, since it uses as much as digits as its factorization.

204121223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204121223 is about 14287.0998806616. The cubic root of 204121223 is about 588.7931117617.

Adding to 204121223 its reverse (322121402), we get a palindrome (526242625).

The spelling of 204121223 in words is "two hundred four million, one hundred twenty-one thousand, two hundred twenty-three".