123121304 has 16 divisors (see below), whose sum is σ = 231265320. Its totient is φ = 61450560.

The previous prime is 123121303. The next prime is 123121307. The reversal of 123121304 is 403121321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121301) 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, 8909 + ... + 18044.

Almost surely, 2^123121304 is an apocalyptic number.

It is an amenable number.

123121304 is a deficient number, since it is larger than the sum of its proper divisors (108144016).

123121304 is a wasteful number, since it uses less digits than its factorization.

123121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27530 (or 27526 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123121304 is about 11096.0039653922. The cubic root of 123121304 is about 497.4824168259.

Adding to 123121304 its sum of digits (17), we get a palindrome (123121321).

Adding to 123121304 its reverse (403121321), we get a palindrome (526242625).

The spelling of 123121304 in words is "one hundred twenty-three million, one hundred twenty-one thousand, three hundred four".