20221211210220 has 144 divisors (see below), whose sum is σ = 65000395343520. Its totient is φ = 5079395865600.

The previous prime is 20221211210159. The next prime is 20221211210227. The reversal of 20221211210220 is 2201211212202.

It is a happy number.

20221211210220 is a `hidden beast` number, since 2 + 0 + 2 + 21 + 211 + 210 + 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 = 20221211210193 and 20221211210202.

It is not an unprimeable number, because it can be changed into a prime (20221211210227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47027386 + ... + 47455425.

It is an arithmetic number, because the mean of its divisors is an integer number (451391634330).

Almost surely, 2^{20221211210220} is an apocalyptic number.

20221211210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221211210220 is an abundant number, since it is smaller than the sum of its proper divisors (44779184133300).

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

20221211210220 is a wasteful number, since it uses less digits than its factorization.

20221211210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94482896 (or 94482891 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20221211210220 its reverse (2201211212202), we get a palindrome (22422422422422).

The spelling of 20221211210220 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, two hundred twenty".