123341505205 has 4 divisors (see below), whose sum is σ = 148009806252. Its totient is φ = 98673204160.

The previous prime is 123341505193. The next prime is 123341505227. The reversal of 123341505205 is 502505143321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502505143321 = 79 ⋅6360824599.

It can be written as a sum of positive squares in 2 ways, for example, as 35275601124 + 88065904081 = 187818^2 + 296759^2 .

It is not a de Polignac number, because 123341505205 - 2²⁷ = 123207287477 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, 12334150516 + ... + 12334150525.

It is an arithmetic number, because the mean of its divisors is an integer number (37002451563).

Almost surely, 2^123341505205 is an apocalyptic number.

It is an amenable number.

123341505205 is a deficient number, since it is larger than the sum of its proper divisors (24668301047).

123341505205 is an equidigital number, since it uses as much as digits as its factorization.

123341505205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24668301046.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 123341505205 its reverse (502505143321), we get a palindrome (625846648526).

The spelling of 123341505205 in words is "one hundred twenty-three billion, three hundred forty-one million, five hundred five thousand, two hundred five".