2100021110000 has 200 divisors, whose sum is σ = 5549132146800. Its totient is φ = 763292160000.

The previous prime is 2100021109999. The next prime is 2100021110029. The reversal of 2100021110000 is 111200012.

It is a tau number, because it is divible by the number of its divisors (200).

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 2100021110000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 427787546 + ... + 427792454.

It is an arithmetic number, because the mean of its divisors is an integer number (27745660734).

Almost surely, 2^{2100021110000} is an apocalyptic number.

2100021110000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100021110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2774566073400).

2100021110000 is an abundant number, since it is smaller than the sum of its proper divisors (3449111036800).

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

2100021110000 is a wasteful number, since it uses less digits than its factorization.

2100021110000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8837 (or 8816 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 2100021110000 its reverse (111200012), we get a palindrome (2100132310012).

The spelling of 2100021110000 in words is "two trillion, one hundred billion, twenty-one million, one hundred ten thousand".