21220112010220 has 12 divisors (see below), whose sum is σ = 44562235221504. Its totient is φ = 8488044804080.

The previous prime is 21220112010211. The next prime is 21220112010233. The reversal of 21220112010220 is 2201021102212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21220112010194 and 21220112010203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530502800236 + ... + 530502800275.

It is an arithmetic number, because the mean of its divisors is an integer number (3713519601792).

Almost surely, 2^{21220112010220} is an apocalyptic number.

21220112010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220112010220 is an abundant number, since it is smaller than the sum of its proper divisors (23342123211284).

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

21220112010220 is a wasteful number, since it uses less digits than its factorization.

21220112010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061005600520 (or 1061005600518 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220112010220 its reverse (2201021102212), we get a palindrome (23421133112432).

The spelling of 21220112010220 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, ten thousand, two hundred twenty".