2102110021100 has 18 divisors (see below), whose sum is σ = 4561578746004. Its totient is φ = 840844008400.

The previous prime is 2102110021069. The next prime is 2102110021117. The reversal of 2102110021100 is 11200112012.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10510550006 + ... + 10510550205.

Almost surely, 2^{2102110021100} is an apocalyptic number.

2102110021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102110021100 is an abundant number, since it is smaller than the sum of its proper divisors (2459468724904).

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

2102110021100 is a wasteful number, since it uses less digits than its factorization.

2102110021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21021100225 (or 21021100218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2102110021100 its reverse (11200112012), we get a palindrome (2113310133112).

The spelling of 2102110021100 in words is "two trillion, one hundred two billion, one hundred ten million, twenty-one thousand, one hundred".