12123400002 has 32 divisors (see below), whose sum is σ = 27724032000. Its totient is φ = 3462153168.

The previous prime is 12123399971. The next prime is 12123400021. The reversal of 12123400002 is 20000432121.

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, 19399 + ... + 156917.

It is an arithmetic number, because the mean of its divisors is an integer number (866376000).

Almost surely, 2^12123400002 is an apocalyptic number.

12123400002 is an abundant number, since it is smaller than the sum of its proper divisors (15600631998).

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

12123400002 is a wasteful number, since it uses less digits than its factorization.

12123400002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139630.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12123400002 its reverse (20000432121), we get a palindrome (32123832123).

The spelling of 12123400002 in words is "twelve billion, one hundred twenty-three million, four hundred thousand, two".