123012120 has 128 divisors (see below), whose sum is σ = 460131840. Its totient is φ = 25559040.

The previous prime is 123012107. The next prime is 123012143. The reversal of 123012120 is 21210321.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 123012096 and 123012105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2584 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (3594780).

Almost surely, 2^123012120 is an apocalyptic number.

123012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230065920).

123012120 is an abundant number, since it is smaller than the sum of its proper divisors (337119720).

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

123012120 is a wasteful number, since it uses less digits than its factorization.

123012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13345 (or 13341 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 123012120 is about 11091.0829047483. The cubic root of 123012120 is about 497.3353174952.

Adding to 123012120 its reverse (21210321), we get a palindrome (144222441).

The spelling of 123012120 in words is "one hundred twenty-three million, twelve thousand, one hundred twenty".