2101000021100 has 36 divisors (see below), whose sum is σ = 4593972899208. Its totient is φ = 833984736000.

The previous prime is 2101000021067. The next prime is 2101000021121. The reversal of 2101000021100 is 11200001012.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80177741 + ... + 80203940.

Almost surely, 2^{2101000021100} is an apocalyptic number.

2101000021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101000021100 is an abundant number, since it is smaller than the sum of its proper divisors (2492972878108).

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

2101000021100 is a wasteful number, since it uses less digits than its factorization.

2101000021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160381826 (or 160381819 counting only the distinct ones).

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

Adding to 2101000021100 its reverse (11200001012), we get a palindrome (2112200022112).

The spelling of 2101000021100 in words is "two trillion, one hundred one billion, twenty-one thousand, one hundred".