22221323210000 has 50 divisors (see below), whose sum is σ = 53800045647942. Its totient is φ = 8888529280000.

The previous prime is 22221323209973. The next prime is 22221323210087. The reversal of 22221323210000 is 1232312222.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 16161139688464 + 6060183521536 = 4020092^2 + 2461744^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (20).

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 9 ways as a sum of consecutive naturals, for example, 1111056161 + ... + 1111076160.

Almost surely, 2^{22221323210000} is an apocalyptic number.

22221323210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221323210000 is an abundant number, since it is smaller than the sum of its proper divisors (31578722437942).

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

22221323210000 is an equidigital number, since it uses as much as digits as its factorization.

22221323210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222132349 (or 2222132328 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22221323210000 its reverse (1232312222), we get a palindrome (22222555522222).

The spelling of 22221323210000 in words is "twenty-two trillion, two hundred twenty-one billion, three hundred twenty-three million, two hundred ten thousand".