203312312120 has 32 divisors (see below), whose sum is σ = 458061894720. Its totient is φ = 81216624000.

The previous prime is 203312312101. The next prime is 203312312123. The reversal of 203312312120 is 21213213302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 203312312092 and 203312312101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203312312123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3353987 + ... + 3414066.

It is an arithmetic number, because the mean of its divisors is an integer number (14314434210).

Almost surely, 2^203312312120 is an apocalyptic number.

203312312120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203312312120 is an abundant number, since it is smaller than the sum of its proper divisors (254749582600).

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

203312312120 is a wasteful number, since it uses less digits than its factorization.

203312312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768815 (or 6768811 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203312312120 its reverse (21213213302), we get a palindrome (224525525422).

The spelling of 203312312120 in words is "two hundred three billion, three hundred twelve million, three hundred twelve thousand, one hundred twenty".