20221221111112 has 16 divisors (see below), whose sum is σ = 43331188095360. Its totient is φ = 8666237619024.

The previous prime is 20221221111031. The next prime is 20221221111127. The reversal of 20221221111112 is 21111112212202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20221221111112.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 180546617008 + ... + 180546617119.

It is an arithmetic number, because the mean of its divisors is an integer number (2708199255960).

Almost surely, 2^{20221221111112} is an apocalyptic number.

It is an amenable number.

20221221111112 is an abundant number, since it is smaller than the sum of its proper divisors (23109966984248).

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

20221221111112 is a wasteful number, since it uses less digits than its factorization.

20221221111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361093234140 (or 361093234136 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20221221111112 its reverse (21111112212202), we get a palindrome (41332333323314).

The spelling of 20221221111112 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twelve".