100020100 has 36 divisors (see below), whose sum is σ = 226485504. Its totient is φ = 38267680.

The previous prime is 100020023. The next prime is 100020103. The reversal of 100020100 is 1020001.

It is a super-3 number, since 3×100020100³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a self number, because there is not a number n which added to its sum of digits gives 100020100.

It is not an unprimeable number, because it can be changed into a prime (100020103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19444 + ... + 24043.

It is an arithmetic number, because the mean of its divisors is an integer number (6291264).

Almost surely, 2^100020100 is an apocalyptic number.

100020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020100 is an abundant number, since it is smaller than the sum of its proper divisors (126465404).

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

100020100 is a wasteful number, since it uses less digits than its factorization.

100020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43524 (or 43517 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 100020100 is about 10001.0049495038. The cubic root of 100020100 is about 464.1899799231.

Adding to 100020100 its reverse (1020001), we get a palindrome (101040101).

Subtracting from 100020100 its reverse (1020001), we obtain a palindrome (99000099).

The spelling of 100020100 in words is "one hundred million, twenty thousand, one hundred".