123204424521 has 8 divisors (see below), whose sum is σ = 164274488224. Its totient is φ = 82135321920.

The previous prime is 123204424517. The next prime is 123204424549. The reversal of 123204424521 is 125424402321.

It is a happy number.

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

It is not a de Polignac number, because 123204424521 - 2² = 123204424517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123204424591) 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, 148881 + ... + 518241.

It is an arithmetic number, because the mean of its divisors is an integer number (20534311028).

Almost surely, 2^123204424521 is an apocalyptic number.

It is an amenable number.

123204424521 is a deficient number, since it is larger than the sum of its proper divisors (41070063703).

123204424521 is a wasteful number, since it uses less digits than its factorization.

123204424521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480551.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 123204424521 its reverse (125424402321), we get a palindrome (248628826842).

The spelling of 123204424521 in words is "one hundred twenty-three billion, two hundred four million, four hundred twenty-four thousand, five hundred twenty-one".