20012221100000 has 72 divisors (see below), whose sum is σ = 49245673684536. Its totient is φ = 8004888400000.

The previous prime is 20012221099963. The next prime is 20012221100029. The reversal of 20012221100000 is 112221002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 99961106 + ... + 100161105.

It is an arithmetic number, because the mean of its divisors is an integer number (683967690063).

Almost surely, 2^{20012221100000} is an apocalyptic number.

20012221100000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012221100000 is an abundant number, since it is smaller than the sum of its proper divisors (29233452584536).

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

20012221100000 is an frugal number, since it uses more digits than its factorization.

20012221100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200122246 (or 200122218 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20012221100000 its reverse (112221002), we get a palindrome (20012333321002).

The spelling of 20012221100000 in words is "twenty trillion, twelve billion, two hundred twenty-one million, one hundred thousand".