123320210 has 64 divisors (see below), whose sum is σ = 259477344. Its totient is φ = 41779200.

The previous prime is 123320191. The next prime is 123320213. The reversal of 123320210 is 12023321.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 4313929 + 119006281 = 2077^2 + 10909^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123320213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89930 + ... + 91290.

Almost surely, 2^123320210 is an apocalyptic number.

123320210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123320210 is an abundant number, since it is smaller than the sum of its proper divisors (136157134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123320210 is a wasteful number, since it uses less digits than its factorization.

123320210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123320210 is about 11104.9633047570. The cubic root of 123320210 is about 497.7501717295.

Adding to 123320210 its reverse (12023321), we get a palindrome (135343531).

The spelling of 123320210 in words is "one hundred twenty-three million, three hundred twenty thousand, two hundred ten".