20021100221012 has 48 divisors (see below), whose sum is σ = 39143128191552. Its totient is φ = 8881555630080.

The previous prime is 20021100220997. The next prime is 20021100221021. The reversal of 20021100221012 is 21012200112002.

It is a congruent number.

It is an unprimeable number.

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, 2045003 + ... + 6650130.

It is an arithmetic number, because the mean of its divisors is an integer number (815481837324).

Almost surely, 2^{20021100221012} is an apocalyptic number.

20021100221012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021100221012 is a deficient number, since it is larger than the sum of its proper divisors (19122027970540).

20021100221012 is a wasteful number, since it uses less digits than its factorization.

20021100221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8696408 (or 8696406 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021100221012 its reverse (21012200112002), we get a palindrome (41033300333014).

The spelling of 20021100221012 in words is "twenty trillion, twenty-one billion, one hundred million, two hundred twenty-one thousand, twelve".