21411144222 has 128 divisors (see below), whose sum is σ = 49946803200. Its totient is φ = 6064041984.

The previous prime is 21411144217. The next prime is 21411144229. The reversal of 21411144222 is 22244111412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21411144192 and 21411144201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411144229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23047054 + ... + 23047982.

It is an arithmetic number, because the mean of its divisors is an integer number (390209400).

Almost surely, 2^21411144222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21411144222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24973401600).

21411144222 is an abundant number, since it is smaller than the sum of its proper divisors (28535658978).

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

21411144222 is a wasteful number, since it uses less digits than its factorization.

21411144222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442.

The product of its digits is 1024, while the sum is 24.

Adding to 21411144222 its reverse (22244111412), we get a palindrome (43655255634).

The spelling of 21411144222 in words is "twenty-one billion, four hundred eleven million, one hundred forty-four thousand, two hundred twenty-two".