21222222021120 has 80 divisors (see below), whose sum is σ = 67844791048320. Its totient is φ = 5659259203584.

The previous prime is 21222222021071. The next prime is 21222222021137. The reversal of 21222222021120 is 2112022222212.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381647400 + ... + 1381662759.

It is an arithmetic number, because the mean of its divisors is an integer number (848059888104).

Almost surely, 2^{21222222021120} is an apocalyptic number.

21222222021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222222021120 is an abundant number, since it is smaller than the sum of its proper divisors (46622569027200).

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

21222222021120 is an equidigital number, since it uses as much as digits as its factorization.

21222222021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763310185 (or 2763310169 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21222222021120 its reverse (2112022222212), we get a palindrome (23334244243332).

The spelling of 21222222021120 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty".