123210112 has 32 divisors (see below), whose sum is σ = 247737600. Its totient is φ = 61032960.

The previous prime is 123210091. The next prime is 123210121. The reversal of 123210112 is 211012321.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 123210092 and 123210101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9537 + ... + 18367.

It is an arithmetic number, because the mean of its divisors is an integer number (7741800).

Almost surely, 2^123210112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123868800).

123210112 is an abundant number, since it is smaller than the sum of its proper divisors (124527488).

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

123210112 is an equidigital number, since it uses as much as digits as its factorization.

123210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8954 (or 8942 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 123210112 is about 11100.0050450439. The cubic root of 123210112 is about 497.6020002470.

Adding to 123210112 its reverse (211012321), we get a palindrome (334222433).

The spelling of 123210112 in words is "one hundred twenty-three million, two hundred ten thousand, one hundred twelve".