20211020112220 has 96 divisors (see below), whose sum is σ = 49636236722688. Its totient is φ = 6768105507072.

The previous prime is 20211020112161. The next prime is 20211020112233. The reversal of 20211020112220 is 2221102011202.

It is a happy number.

It is a super-2 number, since 2×20211020112220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211020112194 and 20211020112203.

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, 301430019 + ... + 301497061.

It is an arithmetic number, because the mean of its divisors is an integer number (517044132528).

Almost surely, 2^{20211020112220} is an apocalyptic number.

20211020112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211020112220 is an abundant number, since it is smaller than the sum of its proper divisors (29425216610468).

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

20211020112220 is a wasteful number, since it uses less digits than its factorization.

20211020112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117179 (or 117177 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211020112220 its reverse (2221102011202), we get a palindrome (22432122123422).

The spelling of 20211020112220 in words is "twenty trillion, two hundred eleven billion, twenty million, one hundred twelve thousand, two hundred twenty".