20010101000220 has 96 divisors (see below), whose sum is σ = 62254729131840. Its totient is φ = 5335934227200.

The previous prime is 20010101000159. The next prime is 20010101000233. The reversal of 20010101000220 is 2200010101002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34216594 + ... + 34796486.

It is an arithmetic number, because the mean of its divisors is an integer number (648486761790).

Almost surely, 2^{20010101000220} is an apocalyptic number.

20010101000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010101000220 is an abundant number, since it is smaller than the sum of its proper divisors (42244628131620).

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

20010101000220 is a wasteful number, since it uses less digits than its factorization.

20010101000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643812 (or 643804 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010101000220 its reverse (2200010101002), we get a palindrome (22210111101222).

The spelling of 20010101000220 in words is "twenty trillion, ten billion, one hundred one million, two hundred twenty", and thus it is an aban number.