20011101110220 has 192 divisors, whose sum is σ = 61836507532800. Its totient is φ = 4794910525440.

The previous prime is 20011101110197. The next prime is 20011101110237. The reversal of 20011101110220 is 2201110111002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20011101110196 and 20011101110205.

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 63 ways as a sum of consecutive naturals, for example, 29083407 + ... + 29763513.

It is an arithmetic number, because the mean of its divisors is an integer number (322065143400).

Almost surely, 2^{20011101110220} is an apocalyptic number.

20011101110220 is a gapful number since it is divisible by the number (20) 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 20011101110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30918253766400).

20011101110220 is an abundant number, since it is smaller than the sum of its proper divisors (41825406422580).

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

20011101110220 is a wasteful number, since it uses less digits than its factorization.

20011101110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680648 (or 680646 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20011101110220 its reverse (2201110111002), we get a palindrome (22212211221222).

The spelling of 20011101110220 in words is "twenty trillion, eleven billion, one hundred one million, one hundred ten thousand, two hundred twenty".