21120101200220 has 48 divisors (see below), whose sum is σ = 48654534902400. Its totient is φ = 7637131552320.

The previous prime is 21120101200207. The next prime is 21120101200241. The reversal of 21120101200220 is 2200210102112.

It is a junction number, because it is equal to n+sod(n) for n = 21120101200195 and 21120101200204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268118330 + ... + 268197089.

It is an arithmetic number, because the mean of its divisors is an integer number (1013636143800).

Almost surely, 2^{21120101200220} is an apocalyptic number.

21120101200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120101200220 is an abundant number, since it is smaller than the sum of its proper divisors (27534433702180).

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

21120101200220 is a wasteful number, since it uses less digits than its factorization.

21120101200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536315618 (or 536315616 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120101200220 its reverse (2200210102112), we get a palindrome (23320311302332).

The spelling of 21120101200220 in words is "twenty-one trillion, one hundred twenty billion, one hundred one million, two hundred thousand, two hundred twenty".