123312180 has 24 divisors (see below), whose sum is σ = 345274272. Its totient is φ = 32883232.

The previous prime is 123312113. The next prime is 123312181. The reversal of 123312180 is 81213321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312181) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1027542 + ... + 1027661.

It is an arithmetic number, because the mean of its divisors is an integer number (14386428).

Almost surely, 2^123312180 is an apocalyptic number.

123312180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123312180 is an abundant number, since it is smaller than the sum of its proper divisors (221962092).

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

123312180 is a wasteful number, since it uses less digits than its factorization.

123312180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055215 (or 2055213 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 123312180 is about 11104.6017488247. The cubic root of 123312180 is about 497.7393678215.

It can be divided in two parts, 1233 and 12180, that multiplied together give a triangular number (15017940 = T₅₄₈₀).

The spelling of 123312180 in words is "one hundred twenty-three million, three hundred twelve thousand, one hundred eighty".