100001010010020 has 192 divisors, whose sum is σ = 327747809088000. Its totient is φ = 22772400806400.

The previous prime is 100001010010007. The next prime is 100001010010037. The reversal of 100001010010020 is 20010010100001.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 100001010009990 and 100001010010008.

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, 3495831 + ... + 14567870.

It is an arithmetic number, because the mean of its divisors is an integer number (1707019839000).

Almost surely, 2^{100001010010020} is an apocalyptic number.

100001010010020 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 100001010010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163873904544000).

100001010010020 is an abundant number, since it is smaller than the sum of its proper divisors (227746799077980).

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

100001010010020 is a wasteful number, since it uses less digits than its factorization.

100001010010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18064003 (or 18063987 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 100001010010020 its reverse (20010010100001), we get a palindrome (120011020110021).

The spelling of 100001010010020 in words is "one hundred trillion, one billion, ten million, ten thousand, twenty".