123012205 has 8 divisors (see below), whose sum is σ = 150400152. Its totient is φ = 96552768.

The previous prime is 123012203. The next prime is 123012223. The reversal of 123012205 is 502210321.

It can be written as a sum of positive squares in 4 ways, for example, as 33028009 + 89984196 = 5747^2 + 9486^2 .

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 123012205 - 2¹ = 123012203 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 (123012203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231834 + ... + 232363.

It is an arithmetic number, because the mean of its divisors is an integer number (18800019).

Almost surely, 2^123012205 is an apocalyptic number.

It is an amenable number.

123012205 is a deficient number, since it is larger than the sum of its proper divisors (27387947).

123012205 is an equidigital number, since it uses as much as digits as its factorization.

123012205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464255.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 123012205 is about 11091.0867366548. The cubic root of 123012205 is about 497.3354320462.

Adding to 123012205 its reverse (502210321), we get a palindrome (625222526).

The spelling of 123012205 in words is "one hundred twenty-three million, twelve thousand, two hundred five".