123030312312 has 128 divisors (see below), whose sum is σ = 330550824960. Its totient is φ = 38084981760.

The previous prime is 123030312311. The next prime is 123030312313. The reversal of 123030312312 is 213213030321.

123030312312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (123030312311) and next prime (123030312313).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123030312311) 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, 1978933 + ... + 2040155.

It is an arithmetic number, because the mean of its divisors is an integer number (2582428320).

Almost surely, 2^123030312312 is an apocalyptic number.

123030312312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123030312312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165275412480).

123030312312 is an abundant number, since it is smaller than the sum of its proper divisors (207520512648).

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

123030312312 is a wasteful number, since it uses less digits than its factorization.

123030312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61373 (or 61369 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123030312312 its reverse (213213030321), we get a palindrome (336243342633).

The spelling of 123030312312 in words is "one hundred twenty-three billion, thirty million, three hundred twelve thousand, three hundred twelve".