20221211211020 has 24 divisors (see below), whose sum is σ = 42464648520000. Its totient is φ = 8088464488832.

The previous prime is 20221211211017. The next prime is 20221211211029. The reversal of 20221211211020 is 2011211212202.

It is a self number, because there is not a number n which added to its sum of digits gives 20221211211020.

It is not an unprimeable number, because it can be changed into a prime (20221211211029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9156056 + ... + 11147904.

It is an arithmetic number, because the mean of its divisors is an integer number (1769360355000).

Almost surely, 2^{20221211211020} is an apocalyptic number.

20221211211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221211211020 is an abundant number, since it is smaller than the sum of its proper divisors (22243437308980).

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

20221211211020 is a wasteful number, since it uses less digits than its factorization.

20221211211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499457 (or 2499455 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20221211211020 its reverse (2011211212202), we get a palindrome (22232422423222).

The spelling of 20221211211020 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, twenty".