123340402242 has 128 divisors (see below), whose sum is σ = 293399654400. Its totient is φ = 38292585408.

The previous prime is 123340402217. The next prime is 123340402303. The reversal of 123340402242 is 242204043321.

123340402242 is a `hidden beast` number, since 1 + 2 + 33 + 404 + 0 + 224 + 2 = 666.

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

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 42137383 + ... + 42140309.

It is an arithmetic number, because the mean of its divisors is an integer number (2292184800).

Almost surely, 2^123340402242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123340402242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146699827200).

123340402242 is an abundant number, since it is smaller than the sum of its proper divisors (170059252158).

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

123340402242 is a wasteful number, since it uses less digits than its factorization.

123340402242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3631 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 123340402242 its reverse (242204043321), we get a palindrome (365544445563).

The spelling of 123340402242 in words is "one hundred twenty-three billion, three hundred forty million, four hundred two thousand, two hundred forty-two".