20222100021220 has 96 divisors (see below), whose sum is σ = 43866635581440. Its totient is φ = 7826110448640.

The previous prime is 20222100021209. The next prime is 20222100021337. The reversal of 20222100021220 is 2212000122202.

It is a junction number, because it is equal to n+sod(n) for n = 20222100021194 and 20222100021203.

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, 434757765 + ... + 434804275.

It is an arithmetic number, because the mean of its divisors is an integer number (456944120640).

Almost surely, 2^{20222100021220} is an apocalyptic number.

20222100021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20222100021220 is an abundant number, since it is smaller than the sum of its proper divisors (23644535560220).

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

20222100021220 is a wasteful number, since it uses less digits than its factorization.

20222100021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51853 (or 51851 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20222100021220 its reverse (2212000122202), we get a palindrome (22434100143422).

The spelling of 20222100021220 in words is "twenty trillion, two hundred twenty-two billion, one hundred million, twenty-one thousand, two hundred twenty".