123312210 has 32 divisors (see below), whose sum is σ = 338228352. Its totient is φ = 28185600.

The previous prime is 123312199. The next prime is 123312253. The reversal of 123312210 is 12213321.

It is a super-2 number, since 2×123312210² = 30411802270168200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123312210.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 293391 + ... + 293810.

It is an arithmetic number, because the mean of its divisors is an integer number (10569636).

Almost surely, 2^123312210 is an apocalyptic number.

123312210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123312210 is an abundant number, since it is smaller than the sum of its proper divisors (214916142).

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

123312210 is a wasteful number, since it uses less digits than its factorization.

123312210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587218.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123312210 is about 11104.6030996159. The cubic root of 123312210 is about 497.7394081856.

Adding to 123312210 its reverse (12213321), we get a palindrome (135525531).

It can be divided in two parts, 12331 and 2210, that added together give a palindrome (14541).

The spelling of 123312210 in words is "one hundred twenty-three million, three hundred twelve thousand, two hundred ten".