12123252556 has 48 divisors (see below), whose sum is σ = 22985544960. Its totient is φ = 5577042240.

The previous prime is 12123252509. The next prime is 12123252571. The reversal of 12123252556 is 65525232121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344766 + ... + 378298.

It is an arithmetic number, because the mean of its divisors is an integer number (478865520).

Almost surely, 2^12123252556 is an apocalyptic number.

It is an amenable number.

12123252556 is a deficient number, since it is larger than the sum of its proper divisors (10862292404).

12123252556 is a wasteful number, since it uses less digits than its factorization.

12123252556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33694 (or 33692 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

Adding to 12123252556 its reverse (65525232121), we get a palindrome (77648484677).

The spelling of 12123252556 in words is "twelve billion, one hundred twenty-three million, two hundred fifty-two thousand, five hundred fifty-six".