2021010111100 has 144 divisors (see below), whose sum is σ = 4470182640000. Its totient is φ = 792981280000.

The previous prime is 2021010111083. The next prime is 2021010111163. The reversal of 2021010111100 is 11110101202.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1348238151 + ... + 1348239649.

It is an arithmetic number, because the mean of its divisors is an integer number (31042935000).

Almost surely, 2^{2021010111100} is an apocalyptic number.

2021010111100 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 2021010111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235091320000).

2021010111100 is an abundant number, since it is smaller than the sum of its proper divisors (2449172528900).

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

2021010111100 is a wasteful number, since it uses less digits than its factorization.

2021010111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 2021010111100 its reverse (11110101202), we get a palindrome (2032120212302).

The spelling of 2021010111100 in words is "two trillion, twenty-one billion, ten million, one hundred eleven thousand, one hundred".