20011020212100 has 72 divisors (see below), whose sum is σ = 58714024436928. Its totient is φ = 5261113289600.

The previous prime is 20011020212041. The next prime is 20011020212137. The reversal of 20011020212100 is 121202011002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469720959 + ... + 469763558.

It is an arithmetic number, because the mean of its divisors is an integer number (815472561624).

Almost surely, 2^{20011020212100} is an apocalyptic number.

20011020212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011020212100 is an abundant number, since it is smaller than the sum of its proper divisors (38703004224828).

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

20011020212100 is a wasteful number, since it uses less digits than its factorization.

20011020212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939484605 (or 939484598 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20011020212100 its reverse (121202011002), we get a palindrome (20132222223102).

The spelling of 20011020212100 in words is "twenty trillion, eleven billion, twenty million, two hundred twelve thousand, one hundred".