204120123 has 8 divisors (see below), whose sum is σ = 276222528. Its totient is φ = 134048904.

The previous prime is 204120109. The next prime is 204120127. The reversal of 204120123 is 321021402.

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

It is not a de Polignac number, because 204120123 - 2⁹ = 204119611 is a prime.

It is a super-2 number, since 2×204120123² = 83330049227070258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204120127) 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, 507561 + ... + 507962.

It is an arithmetic number, because the mean of its divisors is an integer number (34527816).

Almost surely, 2^204120123 is an apocalyptic number.

204120123 is a deficient number, since it is larger than the sum of its proper divisors (72102405).

204120123 is a wasteful number, since it uses less digits than its factorization.

204120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015593.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 204120123 is about 14287.0613843435. The cubic root of 204120123 is about 588.7920541000.

Adding to 204120123 its reverse (321021402), we get a palindrome (525141525).

The spelling of 204120123 in words is "two hundred four million, one hundred twenty thousand, one hundred twenty-three".