123320521324505 has 8 divisors (see below), whose sum is σ = 149510240286792. Its totient is φ = 97639340594688.

The previous prime is 123320521324463. The next prime is 123320521324513. The reversal of 123320521324505 is 505423125023321.

It can be written as a sum of positive squares in 4 ways, for example, as 42367458522841 + 80953062801664 = 6509029^2 + 8997392^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123320521324505 - 2²² = 123320517130201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127134557582 + ... + 127134558551.

It is an arithmetic number, because the mean of its divisors is an integer number (18688780035849).

Almost surely, 2^{123320521324505} is an apocalyptic number.

It is an amenable number.

123320521324505 is a deficient number, since it is larger than the sum of its proper divisors (26189718962287).

123320521324505 is an equidigital number, since it uses as much as digits as its factorization.

123320521324505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254269116235.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 123320521324505 its reverse (505423125023321), we get a palindrome (628743646347826).

The spelling of 123320521324505 in words is "one hundred twenty-three trillion, three hundred twenty billion, five hundred twenty-one million, three hundred twenty-four thousand, five hundred five".