100201920 has 448 divisors, whose sum is σ = 415113216. Its totient is φ = 19906560.

The previous prime is 100201919. The next prime is 100201943. The reversal of 100201920 is 29102001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100201920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2708142 + ... + 2708178.

It is an arithmetic number, because the mean of its divisors is an integer number (926592).

Almost surely, 2^100201920 is an apocalyptic number.

100201920 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 100201920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207556608).

100201920 is an abundant number, since it is smaller than the sum of its proper divisors (314911296).

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

100201920 is a wasteful number, since it uses less digits than its factorization.

100201920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 100201920 is about 10010.0909086781. The cubic root of 100201920 is about 464.4710831966.

Adding to 100201920 its reverse (29102001), we get a palindrome (129303921).

The spelling of 100201920 in words is "one hundred million, two hundred one thousand, nine hundred twenty".