123021240343 has 4 divisors (see below), whose sum is σ = 123021953008. Its totient is φ = 123020527680.

The previous prime is 123021240283. The next prime is 123021240361. The reversal of 123021240343 is 343042120321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 343042120321 = 12451 ⋅27551371.

It is a cyclic number.

It is not a de Polignac number, because 123021240343 - 2¹³ = 123021232151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021240443) 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, 83878 + ... + 503068.

It is an arithmetic number, because the mean of its divisors is an integer number (30755488252).

Almost surely, 2^123021240343 is an apocalyptic number.

123021240343 is a deficient number, since it is larger than the sum of its proper divisors (712665).

123021240343 is an equidigital number, since it uses as much as digits as its factorization.

123021240343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712664.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 123021240343 its reverse (343042120321), we get a palindrome (466063360664).

The spelling of 123021240343 in words is "one hundred twenty-three billion, twenty-one million, two hundred forty thousand, three hundred forty-three".