21022144233220 has 24 divisors (see below), whose sum is σ = 47542387728024. Its totient is φ = 7762022486016.

The previous prime is 21022144233197. The next prime is 21022144233227. The reversal of 21022144233220 is 2233244122012.

21022144233220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1151964303616 + 19870179929604 = 1073296^2 + 4457598^2 .

It is not an unprimeable number, because it can be changed into a prime (21022144233227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40427200189 + ... + 40427200708.

It is an arithmetic number, because the mean of its divisors is an integer number (1980932822001).

Almost surely, 2^{21022144233220} is an apocalyptic number.

21022144233220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022144233220 is an abundant number, since it is smaller than the sum of its proper divisors (26520243494804).

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

21022144233220 is a wasteful number, since it uses less digits than its factorization.

21022144233220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80854400919 (or 80854400917 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21022144233220 its reverse (2233244122012), we get a palindrome (23255388355232).

The spelling of 21022144233220 in words is "twenty-one trillion, twenty-two billion, one hundred forty-four million, two hundred thirty-three thousand, two hundred twenty".