2021112100000 has 288 divisors, whose sum is σ = 5697827815680. Its totient is φ = 691269120000.

The previous prime is 2021112099983. The next prime is 2021112100009. The reversal of 2021112100000 is 12111202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 2021112100000.

It is not an unprimeable number, because it can be changed into a prime (2021112100009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 307296712 + ... + 307303288.

It is an arithmetic number, because the mean of its divisors is an integer number (19784124360).

Almost surely, 2^{2021112100000} is an apocalyptic number.

2021112100000 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 2021112100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848913907840).

2021112100000 is an abundant number, since it is smaller than the sum of its proper divisors (3676715715680).

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

2021112100000 is an frugal number, since it uses more digits than its factorization.

2021112100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058 (or 7030 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2021112100000 its reverse (12111202), we get a palindrome (2021124211202).

The spelling of 2021112100000 in words is "two trillion, twenty-one billion, one hundred twelve million, one hundred thousand".