20021100201222 has 32 divisors (see below), whose sum is σ = 40059840038400. Its totient is φ = 6670760624160.

The previous prime is 20021100201191. The next prime is 20021100201229. The reversal of 20021100201222 is 22210200112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021100201229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180072904 + ... + 180184052.

It is an arithmetic number, because the mean of its divisors is an integer number (1251870001200).

Almost surely, 2^{20021100201222} is an apocalyptic number.

20021100201222 is an abundant number, since it is smaller than the sum of its proper divisors (20038739837178).

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

20021100201222 is a wasteful number, since it uses less digits than its factorization.

20021100201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124108.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021100201222 its reverse (22210200112002), we get a palindrome (42231300313224).

The spelling of 20021100201222 in words is "twenty trillion, twenty-one billion, one hundred million, two hundred one thousand, two hundred twenty-two".