203112120 has 48 divisors (see below), whose sum is σ = 609805080. Its totient is φ = 54121600.

The previous prime is 203112089. The next prime is 203112131. The reversal of 203112120 is 21211302.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 203112096 and 203112105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155470 + ... + 156770.

Almost surely, 2^203112120 is an apocalyptic number.

203112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203112120 is an abundant number, since it is smaller than the sum of its proper divisors (406692960).

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

203112120 is an equidigital number, since it uses as much as digits as its factorization.

203112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 203112120 is about 14251.7409462844. The cubic root of 203112120 is about 587.8212469739.

Adding to 203112120 its reverse (21211302), we get a palindrome (224323422).

The spelling of 203112120 in words is "two hundred three million, one hundred twelve thousand, one hundred twenty".