21110110200220 has 48 divisors (see below), whose sum is σ = 44656901150400. Its totient is φ = 8382207753216.

The previous prime is 21110110200203. The next prime is 21110110200271. The reversal of 21110110200220 is 2200201101112.

It is a self number, because there is not a number n which added to its sum of digits gives 21110110200220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4401427 + ... + 7848106.

It is an arithmetic number, because the mean of its divisors is an integer number (930352107300).

Almost surely, 2^{21110110200220} is an apocalyptic number.

21110110200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110110200220 is an abundant number, since it is smaller than the sum of its proper divisors (23546790950180).

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

21110110200220 is a wasteful number, since it uses less digits than its factorization.

21110110200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12250174 (or 12250172 counting only the distinct ones).

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

Adding to 21110110200220 its reverse (2200201101112), we get a palindrome (23310311301332).

The spelling of 21110110200220 in words is "twenty-one trillion, one hundred ten billion, one hundred ten million, two hundred thousand, two hundred twenty".