100203031212220 has 96 divisors (see below), whose sum is σ = 224252098560000. Its totient is φ = 37479057122304.

The previous prime is 100203031212199. The next prime is 100203031212227. The reversal of 100203031212220 is 22212130302001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100203031212227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36509941 + ... + 39158419.

It is an arithmetic number, because the mean of its divisors is an integer number (2335959360000).

Almost surely, 2^{100203031212220} is an apocalyptic number.

100203031212220 is a gapful number since it is divisible by the number (10) 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 100203031212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112126049280000).

100203031212220 is an abundant number, since it is smaller than the sum of its proper divisors (124049067347780).

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

100203031212220 is a wasteful number, since it uses less digits than its factorization.

100203031212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649227 (or 2649225 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 100203031212220 its reverse (22212130302001), we get a palindrome (122415161514221).

The spelling of 100203031212220 in words is "one hundred trillion, two hundred three billion, thirty-one million, two hundred twelve thousand, two hundred twenty".