123143322340 has 48 divisors (see below), whose sum is σ = 267859166400. Its totient is φ = 47498193792.

The previous prime is 123143322319. The next prime is 123143322343. The reversal of 123143322340 is 43223341321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123143322299 and 123143322308.

It is not an unprimeable number, because it can be changed into a prime (123143322343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321571 + ... + 591349.

It is an arithmetic number, because the mean of its divisors is an integer number (5580399300).

Almost surely, 2^123143322340 is an apocalyptic number.

123143322340 is a gapful number since it is divisible by the number (10) 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 123143322340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133929583200).

123143322340 is an abundant number, since it is smaller than the sum of its proper divisors (144715844060).

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

123143322340 is a wasteful number, since it uses less digits than its factorization.

123143322340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270604 (or 270602 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 123143322340 its reverse (43223341321), we get a palindrome (166366663661).

The spelling of 123143322340 in words is "one hundred twenty-three billion, one hundred forty-three million, three hundred twenty-two thousand, three hundred forty".