21222110000220 has 48 divisors (see below), whose sum is σ = 59456039199648. Its totient is φ = 5655978743040.

The previous prime is 21222110000207. The next prime is 21222110000249. The reversal of 21222110000220 is 2200001122212.

It is a super-2 number, since 2×21222110000220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21222110000220.

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, 101475619 + ... + 101684538.

It is an arithmetic number, because the mean of its divisors is an integer number (1238667483326).

Almost surely, 2^{21222110000220} is an apocalyptic number.

21222110000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222110000220 is an abundant number, since it is smaller than the sum of its proper divisors (38233929199428).

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

21222110000220 is a wasteful number, since it uses less digits than its factorization.

21222110000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203161910 (or 203161908 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21222110000220 its reverse (2200001122212), we get a palindrome (23422111122432).

The spelling of 21222110000220 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, two hundred twenty", and thus it is an aban number.