22221420144 has 160 divisors (see below), whose sum is σ = 71633748480. Its totient is φ = 5766681600.

The previous prime is 22221420127. The next prime is 22221420149. The reversal of 22221420144 is 44102412222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221420149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5989362 + ... + 5993070.

It is an arithmetic number, because the mean of its divisors is an integer number (447710928).

Almost surely, 2^22221420144 is an apocalyptic number.

22221420144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221420144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35816874240).

22221420144 is an abundant number, since it is smaller than the sum of its proper divisors (49412328336).

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

22221420144 is a wasteful number, since it uses less digits than its factorization.

22221420144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359 (or 5353 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 22221420144 its reverse (44102412222), we get a palindrome (66323832366).

The spelling of 22221420144 in words is "twenty-two billion, two hundred twenty-one million, four hundred twenty thousand, one hundred forty-four".