20212020122220 has 216 divisors, whose sum is σ = 63797738659200. Its totient is φ = 5378602963968.

The previous prime is 20212020122213. The next prime is 20212020122233. The reversal of 20212020122220 is 2222102021202.

20212020122220 is a `hidden beast` number, since 202 + 1 + 20 + 201 + 22 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20212020122193 and 20212020122202.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62693596 + ... + 63015164.

It is an arithmetic number, because the mean of its divisors is an integer number (295359901200).

Almost surely, 2^{20212020122220} is an apocalyptic number.

20212020122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212020122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31898869329600).

20212020122220 is an abundant number, since it is smaller than the sum of its proper divisors (43585718536980).

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

20212020122220 is an equidigital number, since it uses as much as digits as its factorization.

20212020122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322081 (or 322058 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20212020122220 its reverse (2222102021202), we get a palindrome (22434122143422).

The spelling of 20212020122220 in words is "twenty trillion, two hundred twelve billion, twenty million, one hundred twenty-two thousand, two hundred twenty".