100100200012020 has 240 divisors, whose sum is σ = 355971862794240. Its totient is φ = 23343204443904.

The previous prime is 100100200012003. The next prime is 100100200012117. The reversal of 100100200012020 is 20210002001001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100100200011993 and 100100200012011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 124681332 + ... + 125481611.

It is an arithmetic number, because the mean of its divisors is an integer number (1483216094976).

Almost surely, 2^{100100200012020} is an apocalyptic number.

100100200012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100100200012020 is an abundant number, since it is smaller than the sum of its proper divisors (255871662782220).

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

100100200012020 is a wasteful number, since it uses less digits than its factorization.

100100200012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250162996 (or 250162985 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100100200012020 its reverse (20210002001001), we get a palindrome (120310202013021).

The spelling of 100100200012020 in words is "one hundred trillion, one hundred billion, two hundred million, twelve thousand, twenty".