203123112 has 32 divisors (see below), whose sum is σ = 508166880. Its totient is φ = 67659840.

The previous prime is 203123101. The next prime is 203123113. The reversal of 203123112 is 211321302.

It is a junction number, because it is equal to n+sod(n) for n = 203123091 and 203123100.

It is not an unprimeable number, because it can be changed into a prime (203123113) 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, 53187 + ... + 56877.

It is an arithmetic number, because the mean of its divisors is an integer number (15880215).

Almost surely, 2^203123112 is an apocalyptic number.

It is an amenable number.

203123112 is an abundant number, since it is smaller than the sum of its proper divisors (305043768).

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

203123112 is a wasteful number, since it uses less digits than its factorization.

203123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993 (or 5989 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 203123112 is about 14252.1265781637. The cubic root of 203123112 is about 587.8318506651.

Adding to 203123112 its reverse (211321302), we get a palindrome (414444414).

The spelling of 203123112 in words is "two hundred three million, one hundred twenty-three thousand, one hundred twelve".