20011221222202 has 16 divisors (see below), whose sum is σ = 34625557684800. Its totient is φ = 8496085912128.

The previous prime is 20011221222169. The next prime is 20011221222203. The reversal of 20011221222202 is 20222212211002.

It is a self number, because there is not a number n which added to its sum of digits gives 20011221222202.

It is not an unprimeable number, because it can be changed into a prime (20011221222203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6679311327 + ... + 6679314322.

It is an arithmetic number, because the mean of its divisors is an integer number (2164097355300).

Almost surely, 2^{20011221222202} is an apocalyptic number.

20011221222202 is a deficient number, since it is larger than the sum of its proper divisors (14614336462598).

20011221222202 is a wasteful number, since it uses less digits than its factorization.

20011221222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13358625765.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20011221222202 its reverse (20222212211002), we get a palindrome (40233433433204).

The spelling of 20011221222202 in words is "twenty trillion, eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred two".