123123312343 has 4 divisors (see below), whose sum is σ = 127095032128. Its totient is φ = 119151592560.

The previous prime is 123123312329. The next prime is 123123312383. The reversal of 123123312343 is 343213321321.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-123123312343 is a prime.

It is a super-2 number, since 2×123123312343² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123123312383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1985859846 + ... + 1985859907.

It is an arithmetic number, because the mean of its divisors is an integer number (31773758032).

Almost surely, 2^123123312343 is an apocalyptic number.

123123312343 is a deficient number, since it is larger than the sum of its proper divisors (3971719785).

123123312343 is an equidigital number, since it uses as much as digits as its factorization.

123123312343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971719784.

The product of its digits is 7776, while the sum is 28.

Adding to 123123312343 its reverse (343213321321), we get a palindrome (466336633664).

The spelling of 123123312343 in words is "one hundred twenty-three billion, one hundred twenty-three million, three hundred twelve thousand, three hundred forty-three".