12123121204 has 24 divisors (see below), whose sum is σ = 21285482400. Its totient is φ = 6041579040.

The previous prime is 12123121201. The next prime is 12123121289. The reversal of 12123121204 is 40212132121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123121201) 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, 3637819 + ... + 3641149.

It is an arithmetic number, because the mean of its divisors is an integer number (886895100).

Almost surely, 2^12123121204 is an apocalyptic number.

It is an amenable number.

12123121204 is a deficient number, since it is larger than the sum of its proper divisors (9162361196).

12123121204 is a wasteful number, since it uses less digits than its factorization.

12123121204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6063 (or 6061 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12123121204 its reverse (40212132121), we get a palindrome (52335253325).

It can be divided in two parts, 12 and 123121204, that added together give a square (123121216 = 11096²).

The spelling of 12123121204 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred four".