20211221120222 has 32 divisors (see below), whose sum is σ = 34297004037600. Its totient is φ = 8848440921600.

The previous prime is 20211221120219. The next prime is 20211221120243. The reversal of 20211221120222 is 22202112211202.

It is a junction number, because it is equal to n+sod(n) for n = 20211221120194 and 20211221120203.

It is a congruent number.

It is an unprimeable number.

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, 38466479 + ... + 38988362.

It is an arithmetic number, because the mean of its divisors is an integer number (1071781376175).

Almost surely, 2^{20211221120222} is an apocalyptic number.

20211221120222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20211221120222 is a deficient number, since it is larger than the sum of its proper divisors (14085782917378).

20211221120222 is a wasteful number, since it uses less digits than its factorization.

20211221120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77455292.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20211221120222 its reverse (22202112211202), we get a palindrome (42413333331424).

It can be divided in two parts, 202112211202 and 22, that multiplied together give a palindrome (4446468646444).

The spelling of 20211221120222 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-two".