100020102020 has 12 divisors (see below), whose sum is σ = 210042214284. Its totient is φ = 40008040800.

The previous prime is 100020102011. The next prime is 100020102031. The reversal of 100020102020 is 20201020001.

It can be written as a sum of positive squares in 2 ways, for example, as 29358766336 + 70661335684 = 171344^2 + 265822^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100020101989 and 100020102007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500502531 + ... + 2500502570.

It is an arithmetic number, because the mean of its divisors is an integer number (17503517857).

Almost surely, 2^100020102020 is an apocalyptic number.

100020102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020102020 is an abundant number, since it is smaller than the sum of its proper divisors (110022112264).

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

100020102020 is a wasteful number, since it uses less digits than its factorization.

100020102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001005110 (or 5001005108 counting only the distinct ones).

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

Adding to 100020102020 its reverse (20201020001), we get a palindrome (120221122021).

The spelling of 100020102020 in words is "one hundred billion, twenty million, one hundred two thousand, twenty".