12123204210 has 96 divisors (see below), whose sum is σ = 34013332080. Its totient is φ = 2978164224.

The previous prime is 12123204173. The next prime is 12123204211. The reversal of 12123204210 is 1240232121.

It is a happy number.

12123204210 is a `hidden beast` number, since 1 + 212 + 32 + 0 + 421 + 0 = 666.

12123204210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 5397400089 + 6725804121 = 73467^2 + 82011^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12123204211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 585352 + ... + 605708.

Almost surely, 2^12123204210 is an apocalyptic number.

12123204210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12123204210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17006666040).

12123204210 is an abundant number, since it is smaller than the sum of its proper divisors (21890127870).

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

12123204210 is a wasteful number, since it uses less digits than its factorization.

12123204210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20892 (or 20889 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12123204210 its reverse (1240232121), we get a palindrome (13363436331).

The spelling of 12123204210 in words is "twelve billion, one hundred twenty-three million, two hundred four thousand, two hundred ten".