20111221100222 has 12 divisors (see below), whose sum is σ = 35092028654640. Its totient is φ = 8619094757196.

The previous prime is 20111221100221. The next prime is 20111221100233. The reversal of 20111221100222 is 22200112211102.

It is a super-2 number, since 2×20111221100222² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20111221100222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111221100221) 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 5 ways as a sum of consecutive naturals, for example, 102608270822 + ... + 102608271017.

It is an arithmetic number, because the mean of its divisors is an integer number (2924335721220).

Almost surely, 2^{20111221100222} is an apocalyptic number.

20111221100222 is a deficient number, since it is larger than the sum of its proper divisors (14980807554418).

20111221100222 is a wasteful number, since it uses less digits than its factorization.

20111221100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205216541855 (or 205216541848 counting only the distinct ones).

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

Adding to 20111221100222 its reverse (22200112211102), we get a palindrome (42311333311324).

The spelling of 20111221100222 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-one million, one hundred thousand, two hundred twenty-two".