20101000000220 has 24 divisors (see below), whose sum is σ = 42445316030208. Its totient is φ = 7995977899200.

The previous prime is 20101000000217. The next prime is 20101000000229. The reversal of 20101000000220 is 2200000010102.

It is a junction number, because it is equal to n+sod(n) for n = 20101000000198 and 20101000000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101000000229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2776377596 + ... + 2776384835.

It is an arithmetic number, because the mean of its divisors is an integer number (1768554834592).

Almost surely, 2^{20101000000220} is an apocalyptic number.

20101000000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101000000220 is an abundant number, since it is smaller than the sum of its proper divisors (22344316029988).

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

20101000000220 is a wasteful number, since it uses less digits than its factorization.

20101000000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552762621 (or 5552762619 counting only the distinct ones).

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

Adding to 20101000000220 its reverse (2200000010102), we get a palindrome (22301000010322).

The spelling of 20101000000220 in words is "twenty trillion, one hundred one billion, two hundred twenty", and thus it is an aban number.