123505310212 has 12 divisors (see below), whose sum is σ = 216161389276. Its totient is φ = 61744913280.

The previous prime is 123505310207. The next prime is 123505310219. The reversal of 123505310212 is 212013505321.

It can be written as a sum of positive squares in 2 ways, for example, as 75551317956 + 47953992256 = 274866^2 + 218984^2 .

It is not an unprimeable number, because it can be changed into a prime (123505310219) 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, 1899489 + ... + 1963432.

Almost surely, 2^123505310212 is an apocalyptic number.

It is an amenable number.

123505310212 is a deficient number, since it is larger than the sum of its proper divisors (92656079064).

123505310212 is a wasteful number, since it uses less digits than its factorization.

123505310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870918 (or 3870916 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 123505310212 its reverse (212013505321), we get a palindrome (335518815533).

The spelling of 123505310212 in words is "one hundred twenty-three billion, five hundred five million, three hundred ten thousand, two hundred twelve".