12123122320 has 20 divisors (see below), whose sum is σ = 28186259580. Its totient is φ = 4849248896.

The previous prime is 12123122299. The next prime is 12123122327. The reversal of 12123122320 is 2322132121.

It can be written as a sum of positive squares in 2 ways, for example, as 5974053264 + 6149069056 = 77292^2 + 78416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (12123122327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75769435 + ... + 75769594.

It is an arithmetic number, because the mean of its divisors is an integer number (1409312979).

Almost surely, 2^12123122320 is an apocalyptic number.

12123122320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123122320 is an abundant number, since it is smaller than the sum of its proper divisors (16063137260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12123122320 is a wasteful number, since it uses less digits than its factorization.

12123122320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151539042 (or 151539036 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12123122320 its reverse (2322132121), we get a palindrome (14445254441).

The spelling of 12123122320 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-two thousand, three hundred twenty".