123443243042321 has 4 divisors (see below), whose sum is σ = 123443399275044. Its totient is φ = 123443086809600.

The previous prime is 123443243042131. The next prime is 123443243042393. The reversal of 123443243042321 is 123240342344321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10649518489600 + 112793724552721 = 3263360^2 + 10620439^2 .

It is a cyclic number.

It is not a de Polignac number, because 123443243042321 - 2¹⁴ = 123443243025937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123443243042921) 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, 76925120 + ... + 78513441.

It is an arithmetic number, because the mean of its divisors is an integer number (30860849818761).

Almost surely, 2^{123443243042321} is an apocalyptic number.

It is an amenable number.

123443243042321 is a deficient number, since it is larger than the sum of its proper divisors (156232723).

123443243042321 is an equidigital number, since it uses as much as digits as its factorization.

123443243042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156232722.

The product of its (nonzero) digits is 331776, while the sum is 38.

Adding to 123443243042321 its reverse (123240342344321), we get a palindrome (246683585386642).

The spelling of 123443243042321 in words is "one hundred twenty-three trillion, four hundred forty-three billion, two hundred forty-three million, forty-two thousand, three hundred twenty-one".