20211222122220 has 48 divisors (see below), whose sum is σ = 56904081762528. Its totient is φ = 5359882106880.

The previous prime is 20211222122159. The next prime is 20211222122227. The reversal of 20211222122220 is 2222122211202.

It is not an unprimeable number, because it can be changed into a prime (20211222122227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930524229 + ... + 930545948.

It is an arithmetic number, because the mean of its divisors is an integer number (1185501703386).

Almost surely, 2^{20211222122220} is an apocalyptic number.

20211222122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211222122220 is an abundant number, since it is smaller than the sum of its proper divisors (36692859640308).

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

20211222122220 is a wasteful number, since it uses less digits than its factorization.

20211222122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861070370 (or 1861070368 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20211222122220 its reverse (2222122211202), we get a palindrome (22433344333422).

The spelling of 20211222122220 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty".