20212221122020 has 24 divisors (see below), whose sum is σ = 42726761477568. Its totient is φ = 8031346140000.

The previous prime is 20212221121949. The next prime is 20212221122021. The reversal of 20212221122020 is 2022112221202.

It is not an unprimeable number, because it can be changed into a prime (20212221122021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3346391206 + ... + 3346397245.

It is an arithmetic number, because the mean of its divisors is an integer number (1780281728232).

Almost surely, 2^{20212221122020} is an apocalyptic number.

20212221122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212221122020 is an abundant number, since it is smaller than the sum of its proper divisors (22514540355548).

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

20212221122020 is a wasteful number, since it uses less digits than its factorization.

20212221122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6692788611 (or 6692788609 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20212221122020 its reverse (2022112221202), we get a palindrome (22234333343222).

The spelling of 20212221122020 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty".