21100000220000 has 120 divisors (see below), whose sum is σ = 55902178964016. Its totient is φ = 7790769216000.

The previous prime is 21100000219981. The next prime is 21100000220009. The reversal of 21100000220000 is 2200000112.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21100000220000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100000220009) 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 19 ways as a sum of consecutive naturals, for example, 40316924 + ... + 40836923.

Almost surely, 2^{21100000220000} is an apocalyptic number.

21100000220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100000220000 is an abundant number, since it is smaller than the sum of its proper divisors (34802178744016).

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

21100000220000 is an equidigital number, since it uses as much as digits as its factorization.

21100000220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81153890 (or 81153867 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21100000220000 its reverse (2200000112), we get a palindrome (21102200220112).

The spelling of 21100000220000 in words is "twenty-one trillion, one hundred billion, two hundred twenty thousand".