12123120121230 has 64 divisors (see below), whose sum is σ = 30100380710400. Its totient is φ = 3121189169280.

The previous prime is 12123120121219. The next prime is 12123120121237. The reversal of 12123120121230 is 3212102132121.

It is a junction number, because it is equal to n+sod(n) for n = 12123120121197 and 12123120121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123120121237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16446885 + ... + 17168175.

It is an arithmetic number, because the mean of its divisors is an integer number (470318448600).

Almost surely, 2^{12123120121230} is an apocalyptic number.

12123120121230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12123120121230 is an abundant number, since it is smaller than the sum of its proper divisors (17977260589170).

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

12123120121230 is a wasteful number, since it uses less digits than its factorization.

12123120121230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740649.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12123120121230 its reverse (3212102132121), we get a palindrome (15335222253351).

The spelling of 12123120121230 in words is "twelve trillion, one hundred twenty-three billion, one hundred twenty million, one hundred twenty-one thousand, two hundred thirty".