2112021120100 has 18 divisors (see below), whose sum is σ = 4583085830834. Its totient is φ = 844808448000.

The previous prime is 2112021120049. The next prime is 2112021120101. The reversal of 2112021120100 is 10211202112.

It can be written as a sum of positive squares in 3 ways, for example, as 5093391424 + 2106927728676 = 71368^2 + 1451526^2 .

It is not an unprimeable number, because it can be changed into a prime (2112021120101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10560105501 + ... + 10560105700.

Almost surely, 2^{2112021120100} is an apocalyptic number.

2112021120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112021120100 is an abundant number, since it is smaller than the sum of its proper divisors (2471064710734).

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

2112021120100 is a wasteful number, since it uses less digits than its factorization.

2112021120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120211215 (or 21120211208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2112021120100 its reverse (10211202112), we get a palindrome (2122232322212).

The spelling of 2112021120100 in words is "two trillion, one hundred twelve billion, twenty-one million, one hundred twenty thousand, one hundred".