203101321220 has 96 divisors (see below), whose sum is σ = 499032441600. Its totient is φ = 67980777984.

The previous prime is 203101321187. The next prime is 203101321289. The reversal of 203101321220 is 22123101302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13651946 + ... + 13666814.

It is an arithmetic number, because the mean of its divisors is an integer number (5198254600).

Almost surely, 2^203101321220 is an apocalyptic number.

203101321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203101321220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249516220800).

203101321220 is an abundant number, since it is smaller than the sum of its proper divisors (295931120380).

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

203101321220 is a wasteful number, since it uses less digits than its factorization.

203101321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17197 (or 17195 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203101321220 its reverse (22123101302), we get a palindrome (225224422522).

The spelling of 203101321220 in words is "two hundred three billion, one hundred one million, three hundred twenty-one thousand, two hundred twenty".