123234340242 has 32 divisors (see below), whose sum is σ = 267908461632. Its totient is φ = 37563879744.

The previous prime is 123234340213. The next prime is 123234340249. The reversal of 123234340242 is 242043432321.

It is a super-2 number, since 2×123234340242² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123234340249) 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 15 ways as a sum of consecutive naturals, for example, 7374493 + ... + 7391184.

It is an arithmetic number, because the mean of its divisors is an integer number (8372139426).

Almost surely, 2^123234340242 is an apocalyptic number.

123234340242 is an abundant number, since it is smaller than the sum of its proper divisors (144674121390).

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

123234340242 is a wasteful number, since it uses less digits than its factorization.

123234340242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14765802.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 123234340242 its reverse (242043432321), we get a palindrome (365277772563).

The spelling of 123234340242 in words is "one hundred twenty-three billion, two hundred thirty-four million, three hundred forty thousand, two hundred forty-two".