203121122120 has 32 divisors (see below), whose sum is σ = 522311457600. Its totient is φ = 69641527488.

The previous prime is 203121122107. The next prime is 203121122129. The reversal of 203121122120 is 21221121302.

It is not an unprimeable number, because it can be changed into a prime (203121122129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362716010 + ... + 362716569.

It is an arithmetic number, because the mean of its divisors is an integer number (16322233050).

Almost surely, 2^203121122120 is an apocalyptic number.

203121122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203121122120 is an abundant number, since it is smaller than the sum of its proper divisors (319190335480).

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

203121122120 is a wasteful number, since it uses less digits than its factorization.

203121122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725432597 (or 725432593 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 203121122120 its reverse (21221121302), we get a palindrome (224342243422).

The spelling of 203121122120 in words is "two hundred three billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty".