100012020020 has 144 divisors (see below), whose sum is σ = 233978011344. Its totient is φ = 35878656000.

The previous prime is 100012020011. The next prime is 100012020037. The reversal of 100012020020 is 20020210001.

It can be written as a sum of positive squares in 8 ways, for example, as 1743563536 + 98268456484 = 41756^2 + 313478^2 .

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 91168112 + ... + 91169208.

It is an arithmetic number, because the mean of its divisors is an integer number (1624847301).

Almost surely, 2^100012020020 is an apocalyptic number.

100012020020 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 100012020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116989005672).

100012020020 is an abundant number, since it is smaller than the sum of its proper divisors (133965991324).

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

100012020020 is a wasteful number, since it uses less digits than its factorization.

100012020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602 (or 1589 counting only the distinct ones).

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

Adding to 100012020020 its reverse (20020210001), we get a palindrome (120032230021).

The spelling of 100012020020 in words is "one hundred billion, twelve million, twenty thousand, twenty".