123431212 has 24 divisors (see below), whose sum is σ = 227727360. Its totient is φ = 58451280.

The previous prime is 123431207. The next prime is 123431227. The reversal of 123431212 is 212134321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 123431212.

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, 4762 + ... + 16417.

It is an arithmetic number, because the mean of its divisors is an integer number (9488640).

Almost surely, 2^123431212 is an apocalyptic number.

It is an amenable number.

123431212 is a deficient number, since it is larger than the sum of its proper divisors (104296148).

123431212 is a wasteful number, since it uses less digits than its factorization.

123431212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21261 (or 21259 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 123431212 is about 11109.9600359317. The cubic root of 123431212 is about 497.8994705763.

Adding to 123431212 its reverse (212134321), we get a palindrome (335565533).

The spelling of 123431212 in words is "one hundred twenty-three million, four hundred thirty-one thousand, two hundred twelve".