20001102210220 has 24 divisors (see below), whose sum is σ = 42003490737600. Its totient is φ = 8000216865792.

The previous prime is 20001102210163. The next prime is 20001102210239. The reversal of 20001102210220 is 2201220110002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001102210220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13268085 + ... + 14698444.

It is an arithmetic number, because the mean of its divisors is an integer number (1750145447400).

Almost surely, 2^{20001102210220} is an apocalyptic number.

20001102210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001102210220 is an abundant number, since it is smaller than the sum of its proper divisors (22002388527380).

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

20001102210220 is a wasteful number, since it uses less digits than its factorization.

20001102210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28002297 (or 28002295 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20001102210220 its reverse (2201220110002), we get a palindrome (22202322320222).

The spelling of 20001102210220 in words is "twenty trillion, one billion, one hundred two million, two hundred ten thousand, two hundred twenty".