123100120 has 64 divisors (see below), whose sum is σ = 325412640. Its totient is φ = 41318400.

The previous prime is 123100093. The next prime is 123100127. The reversal of 123100120 is 21001321.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 123100097 and 123100106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123100127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5041 + ... + 16480.

Almost surely, 2^123100120 is an apocalyptic number.

123100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100120 is an abundant number, since it is smaller than the sum of its proper divisors (202312520).

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

123100120 is a wasteful number, since it uses less digits than its factorization.

123100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21556 (or 21552 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 123100120 is about 11095.0493464428. The cubic root of 123100120 is about 497.4538832533.

Adding to 123100120 its reverse (21001321), we get a palindrome (144101441).

The spelling of 123100120 in words is "one hundred twenty-three million, one hundred thousand, one hundred twenty".