12123123102 has 24 divisors (see below), whose sum is σ = 26278311384. Its totient is φ = 4039264944.

The previous prime is 12123123091. The next prime is 12123123137. The reversal of 12123123102 is 20132132121.

12123123102 is a `hidden beast` number, since 121 + 231 + 2 + 310 + 2 = 666.

12123123102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12123123102² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 105588 + ... + 188135.

It is an arithmetic number, because the mean of its divisors is an integer number (1094929641).

Almost surely, 2^12123123102 is an apocalyptic number.

12123123102 is an abundant number, since it is smaller than the sum of its proper divisors (14155188282).

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

12123123102 is a wasteful number, since it uses less digits than its factorization.

12123123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296024 (or 296021 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12123123102 its reverse (20132132121), we get a palindrome (32255255223).

The spelling of 12123123102 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred two".