203123120 has 80 divisors (see below), whose sum is σ = 498128832. Its totient is φ = 76876800.

The previous prime is 203123117. The next prime is 203123131. The reversal of 203123120 is 21321302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 203123095 and 203123104.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 185294 + ... + 186386.

Almost surely, 2^203123120 is an apocalyptic number.

203123120 is a gapful number since it is divisible by the number (20) 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 203123120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249064416).

203123120 is an abundant number, since it is smaller than the sum of its proper divisors (295005712).

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

203123120 is a wasteful number, since it uses less digits than its factorization.

203123120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230 (or 1224 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 203123120 is about 14252.1268588236. The cubic root of 203123120 is about 587.8318583824.

Adding to 203123120 its reverse (21321302), we get a palindrome (224444422).

It can be divided in two parts, 20312 and 3120, that added together give a palindrome (23432).

The spelling of 203123120 in words is "two hundred three million, one hundred twenty-three thousand, one hundred twenty".