123321023431205 has 4 divisors (see below), whose sum is σ = 147985228117452. Its totient is φ = 98656818744960.

The previous prime is 123321023431163. The next prime is 123321023431213. The reversal of 123321023431205 is 502134320123321.

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 94322303009089 + 28998720422116 = 9711967^2 + 5385046^2 .

It is not a de Polignac number, because 123321023431205 - 2¹² = 123321023427109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12332102343116 + ... + 12332102343125.

It is an arithmetic number, because the mean of its divisors is an integer number (36996307029363).

Almost surely, 2^{123321023431205} is an apocalyptic number.

It is an amenable number.

123321023431205 is a deficient number, since it is larger than the sum of its proper divisors (24664204686247).

123321023431205 is an equidigital number, since it uses as much as digits as its factorization.

123321023431205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24664204686246.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 123321023431205 its reverse (502134320123321), we get a palindrome (625455343554526).

The spelling of 123321023431205 in words is "one hundred twenty-three trillion, three hundred twenty-one billion, twenty-three million, four hundred thirty-one thousand, two hundred five".