21200011210220 has 48 divisors (see below), whose sum is σ = 44564520000000. Its totient is φ = 8471532545280.

The previous prime is 21200011210211. The next prime is 21200011210247. The reversal of 21200011210220 is 2201211000212.

It is a junction number, because it is equal to n+sod(n) for n = 21200011210195 and 21200011210204.

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, 96805406 + ... + 97024154.

It is an arithmetic number, because the mean of its divisors is an integer number (928427500000).

Almost surely, 2^{21200011210220} is an apocalyptic number.

21200011210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200011210220 is an abundant number, since it is smaller than the sum of its proper divisors (23364508789780).

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

21200011210220 is a wasteful number, since it uses less digits than its factorization.

21200011210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223578 (or 223576 counting only the distinct ones).

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

Adding to 21200011210220 its reverse (2201211000212), we get a palindrome (23401222210432).

The spelling of 21200011210220 in words is "twenty-one trillion, two hundred billion, eleven million, two hundred ten thousand, two hundred twenty".