21100200110120 has 32 divisors (see below), whose sum is σ = 47475744082920. Its totient is φ = 8440027806720.

The previous prime is 21100200110089. The next prime is 21100200110123. The reversal of 21100200110120 is 2101100200112.

It can be written as a sum of positive squares in 4 ways, for example, as 20480349372484 + 619850737636 = 4525522^2 + 787306^2 .

It is not an unprimeable number, because it can be changed into a prime (21100200110123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5271740 + ... + 8366100.

Almost surely, 2^{21100200110120} is an apocalyptic number.

21100200110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100200110120 is an abundant number, since it is smaller than the sum of its proper divisors (26375543972800).

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

21100200110120 is a wasteful number, since it uses less digits than its factorization.

21100200110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264845 (or 3264841 counting only the distinct ones).

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

Adding to 21100200110120 its reverse (2101100200112), we get a palindrome (23201300310232).

The spelling of 21100200110120 in words is "twenty-one trillion, one hundred billion, two hundred million, one hundred ten thousand, one hundred twenty".