123213012210 has 24 divisors (see below), whose sum is σ = 320353831980. Its totient is φ = 32856803232.

The previous prime is 123213012193. The next prime is 123213012289. The reversal of 123213012210 is 12210312321.

123213012210 is a `hidden beast` number, since 12 + 321 + 301 + 22 + 10 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 110767155489 + 12445856721 = 332817^2 + 111561^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684516645 + ... + 684516824.

Almost surely, 2^123213012210 is an apocalyptic number.

123213012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123213012210 is an abundant number, since it is smaller than the sum of its proper divisors (197140819770).

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

123213012210 is a wasteful number, since it uses less digits than its factorization.

123213012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369033482 (or 1369033479 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123213012210 its reverse (12210312321), we get a palindrome (135423324531).

The spelling of 123213012210 in words is "one hundred twenty-three billion, two hundred thirteen million, twelve thousand, two hundred ten".