12123312030 has 48 divisors (see below), whose sum is σ = 31532065344. Its totient is φ = 3231708480.

The previous prime is 12123312013. The next prime is 12123312037. The reversal of 12123312030 is 3021332121.

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

It is a junction number, because it is equal to n+sod(n) for n = 12123311994 and 12123312012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123312037) 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 23 ways as a sum of consecutive naturals, for example, 240420 + ... + 286440.

It is an arithmetic number, because the mean of its divisors is an integer number (656918028).

Almost surely, 2^12123312030 is an apocalyptic number.

12123312030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12123312030 is an abundant number, since it is smaller than the sum of its proper divisors (19408753314).

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

12123312030 is a wasteful number, since it uses less digits than its factorization.

12123312030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48961 (or 48958 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12123312030 its reverse (3021332121), we get a palindrome (15144644151).

The spelling of 12123312030 in words is "twelve billion, one hundred twenty-three million, three hundred twelve thousand, thirty".