12123010221338 has 32 divisors (see below), whose sum is σ = 19294334136000. Its totient is φ = 5693054088960.

The previous prime is 12123010221331. The next prime is 12123010221391. The reversal of 12123010221338 is 83312201032121.

It is a self number, because there is not a number n which added to its sum of digits gives 12123010221338.

It is not an unprimeable number, because it can be changed into a prime (12123010221331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306403145 + ... + 306442707.

It is an arithmetic number, because the mean of its divisors is an integer number (602947941750).

Almost surely, 2^{12123010221338} is an apocalyptic number.

12123010221338 is a deficient number, since it is larger than the sum of its proper divisors (7171323914662).

12123010221338 is a wasteful number, since it uses less digits than its factorization.

12123010221338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58142.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 12123010221338 its reverse (83312201032121), we get a palindrome (95435211253459).

The spelling of 12123010221338 in words is "twelve trillion, one hundred twenty-three billion, ten million, two hundred twenty-one thousand, three hundred thirty-eight".