123310120 has 32 divisors (see below), whose sum is σ = 279913320. Its totient is φ = 48885760.

The previous prime is 123310087. The next prime is 123310127. The reversal of 123310120 is 21013321.

It can be written as a sum of positive squares in 4 ways, for example, as 78393316 + 44916804 = 8854^2 + 6702^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123310120.

It is not an unprimeable number, because it can be changed into a prime (123310127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9121 + ... + 18160.

Almost surely, 2^123310120 is an apocalyptic number.

123310120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123310120 is an abundant number, since it is smaller than the sum of its proper divisors (156603200).

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

123310120 is a wasteful number, since it uses less digits than its factorization.

123310120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27405 (or 27401 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123310120 is about 11104.5089940978. The cubic root of 123310120 is about 497.7365961331.

Adding to 123310120 its reverse (21013321), we get a palindrome (144323441).

The spelling of 123310120 in words is "one hundred twenty-three million, three hundred ten thousand, one hundred twenty".