20221221000222 has 48 divisors (see below), whose sum is σ = 47858419954800. Its totient is φ = 6119590588800.

The previous prime is 20221221000193. The next prime is 20221221000223. The reversal of 20221221000222 is 22200012212202.

20221221000222 is a `hidden beast` number, since 2 + 0 + 221 + 221 + 0 + 0 + 0 + 222 = 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 = 20221221000195 and 20221221000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221221000223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66950097 + ... + 67251452.

It is an arithmetic number, because the mean of its divisors is an integer number (997050415725).

Almost surely, 2^{20221221000222} is an apocalyptic number.

20221221000222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20221221000222 is an abundant number, since it is smaller than the sum of its proper divisors (27637198954578).

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

20221221000222 is a wasteful number, since it uses less digits than its factorization.

20221221000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134202329 (or 134202326 counting only the distinct ones).

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

Adding to 20221221000222 its reverse (22200012212202), we get a palindrome (42421233212424).

The spelling of 20221221000222 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two", and thus it is an aban number.