12123310320342 has 160 divisors (see below), whose sum is σ = 29762869197600. Its totient is φ = 3665521216512.

The previous prime is 12123310320301. The next prime is 12123310320343. The reversal of 12123310320342 is 24302301332121.

12123310320342 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 3 + 310 + 3 + 2 + 0 + 342 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123310320343) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 324159988 + ... + 324197384.

It is an arithmetic number, because the mean of its divisors is an integer number (186017932485).

Almost surely, 2^{12123310320342} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12123310320342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14881434598800).

12123310320342 is an abundant number, since it is smaller than the sum of its proper divisors (17639558877258).

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

12123310320342 is a wasteful number, since it uses less digits than its factorization.

12123310320342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40092 (or 40083 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 12123310320342 its reverse (24302301332121), we get a palindrome (36425611652463).

The spelling of 12123310320342 in words is "twelve trillion, one hundred twenty-three billion, three hundred ten million, three hundred twenty thousand, three hundred forty-two".