203203121220 has 144 divisors (see below), whose sum is σ = 695604611520. Its totient is φ = 47562681600.

The previous prime is 203203121159. The next prime is 203203121221. The reversal of 203203121220 is 22121302302.

203203121220 is a `hidden beast` number, since 2 + 0 + 320 + 3 + 121 + 220 = 666.

203203121220 is digitally balanced in base 2, base 3 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 203203121193 and 203203121202.

It is not an unprimeable number, because it can be changed into a prime (203203121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1712026 + ... + 1826865.

It is an arithmetic number, because the mean of its divisors is an integer number (4830587580).

Almost surely, 2^203203121220 is an apocalyptic number.

203203121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203203121220 is an abundant number, since it is smaller than the sum of its proper divisors (492401490300).

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

203203121220 is a wasteful number, since it uses less digits than its factorization.

203203121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538946 (or 3538941 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 203203121220 its reverse (22121302302), we get a palindrome (225324423522).

It can be divided in two parts, 203203 and 121220, that added together give a palindrome (324423).

The spelling of 203203121220 in words is "two hundred three billion, two hundred three million, one hundred twenty-one thousand, two hundred twenty".